2.9 Standardized Test Prep Percents

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time

Front

If a savings account earns 3% interest per year, how much interest will $1000 earn in 5 years?

Back

$150

Front

What is 15% of 200?

Back

30

Front

How do you convert a percentage to a decimal?

Back

Divide the percentage by 100.

Front

What percent of 84 is 21?

Back

25%.

Front

If 60% of a number is 66, what is the number?

Back

110.

Front

What is the relationship between percentage, part, and whole?

Back

Percentage = (Part/Whole) × 100.

Front

How do you find the percentage of a number?

Back

Multiply the number by the percentage (as a decimal).

Front

What is the definition of principal in terms of interest?

Back

The principal is the original amount of money deposited or invested.

Front

If you earn $300 in interest from a $3000 investment over 4 years, what is the interest rate?

Back

2.5%.