Lesson 1092 of 1524
Percents
Find the percent increase as a percent of the original amount
Practice this chapterFind the percent increase as a percent of the original amount If the denominator of the fraction is not 100, rewrite it as an equivalent fraction with denominator 100
Convert the fraction to a decimal by dividing the numerator by the denominator Write a sentence that gives the information to find it
percent — A perfecnt is a ratio whose denominator is 100. percent increase — The percent increase is the percent the amount of increase is of the original amount. proportion — A proportion is an equation of the form a b = c d , where b ≠ 0 , d ≠ 0 .The proportion states two ratios or rates are equal. The proportion is read “ a is to b , as c is to d ”. simple interest — If an amount of money, P , the principal, is invested for a period of t years at an annual interest rate r , the amount of interest, I , earned is I = P r t . Interest earned….
Be able to convert a percent to a fraction. Step 1. Write the percent as a ratio with the denominator 100; convert a percent to a decimal. Step 1. Write the percent as a ratio with the denominator 100; convert a decimal to a percent. Step 1. Write the decimal as a fraction.
Worked example
What does “percent” mean in Percents?
- 1Use the wording this chapter gives for percent.
- 2The book says: A perfecnt is a ratio whose denominator is 100.
- 3Do not use the meaning of percent increase. That term means The percent increase is the percent the amount of increase is of the original amount.
Result: A perfecnt is a ratio whose denominator is 100
Why. That is the meaning this chapter gives for percent.
Do not swap percent and percent increase. percent means A perfecnt is a ratio whose denominator is 100. percent increase means The percent increase is the percent the amount of increase is of the original amount.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.