SKU: 48742338857

Math Mammoth Percent

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Description

Math Mammoth PercentMath Mammoth Percent teaches students the concept of percent, percentage of a number, discounts, sales tax, percent of change, circle graphs, and percent of comparison. It is suitable for 6th 8th grades. The concept of percent builds on the students' understanding of fractions and decimals. Specifically, students should be familiar with the idea of finding a fractional part of a whole (such as finding 3 4 of $240). Assuming the student has mastered

Math Mammoth Percent teaches students the concept of percent, percentage of a number, discounts, sales tax, percent of change, circle graphs, and percent of comparison. It is suitable for 6th-8th grades.

The concept of percent builds on the students' understanding of fractions and decimals. Specifically, students should be familiar with the idea of finding a fractional part of a whole (such as finding 3/4 of $240). Assuming the student has mastered that, and can easily convert fractions to decimals, then studying the concept of percent should not be difficult.

The first lesson, Percent, practices the concept of percent as a hundredth part, and how to write fractions and decimals as percentages. Next, we study how to find a percentage when the part and the whole are given (for example, if 15 out of 25 club members are girls, what percentage of them are girls?).

The following two lessons have to do with finding a certain percentage of a given number or quantity. First, we study how to do that using mental math techniques. For example, students find 10% of $400 by dividing $400 by 10. Next, students find a percentage of a quantity using decimal multiplication, including using a calculator. For example, students find 17% of 45 km by multiplying 0.17 _ 45 km.

I prefer teaching students to calculate percentages of quantities using decimals, instead of using percent proportion or some other method. That is because using decimals is simpler: we simply change the percentage into a decimal, and multiply, instead of having to build a proportion or use fractions.

Next is a lesson about discounts, which is an important application in everyday life. Then, we go on to the lesson Practice with Percent, which contrasts the two types of problems students have already studied: questions that ask for a certain percentage of a number (the percentage is given), and questions that ask for the percentage.

The next major topic is the percentage of change. The concept of percentage of change deals with percentage increases and decreases in quantities (especially prices). Tying in with percentage of change, there is one lesson on Comparing Values Using Percentages.

Simple Interest is a lesson on the important topic of interest, using as a context both loans and savings accounts. Students learn to use the formula I = prt in a great variety of problems and situations.

The text concludes with a thorough review lesson of all of the concepts taught in the other lessons.

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SKU: 48742338857

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4.7 ★★★★★
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john wenner
Belleville, US
★★★★★ 2
Fun but not for rough play.
Color: Orange
The ball contented our “golden” Jaxson for about 15 minutes. He then thought it was a regular ball and it’s just a little delicate for a big dog. I just wrote it off as a loss. Great idea but should be more durable.
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Reviewed in the United States on April 7, 2026
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Ang
New York, US
★★★★★ 5
Long lasting charge!
Color: Orange
My 50 pound goldendoodle absolutely loves this ball. It keeps a charge for a long time. It turns off When it’s not being used and we play with it every day.!
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Reviewed in the United States on March 24, 2026
E
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Emeraldcity
Los Angeles, US
★★★★★ 5
Fun toy
Color: Orange
My standard poodle loves this toy. It holds a charge for several hours and is well made
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Reviewed in the United States on April 8, 2026
L
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Lorraine Nathanson
Boise, US
★★★★★ 5
Colorful, Sturdy & Great Value
Color: Large Set of 4
Purchased for our two puppies when they were 2 months old and weighed about 14 pounds so theses balls were a little big for them to hold in their mouths but that didn't stop them from trying. While they did like these balls they much preferred softer soccer balls, the later of which did not hold up well at all. I had hoped they would play with these balls more when they were older but that hasn't happened 5 months later. I guess it's no fun if you can't tear the toy apart. Colors are very bright and they do enjoy chasing after them as long as I am the one rolling them across the room for them. Maybe when they progress to batting things with their paws they will start to do this for themselves.
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Reviewed in the United States on May 18, 2025
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Erik
Fort Morgan, US
★★★★★ 5
My pup loves them
Color: Large Set of 4
Colors are bright and my dog loves the squeaky! Good size no worries of choking.
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Reviewed in the United States on September 10, 2025

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