2021 STAAR Released Test 7th Grade

Front

What is the formula to calculate the percentage of a budget spent on a specific category?

Back

Percentage = (Part / Whole) x 100

Front

If a family has an income of $3,200 and spends $480 on medical expenses, what percent of their income is spent on medical expenses?

Back

15% (calculated as (480 / 3200) x 100)

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit.

Front

If Will spent $3.75 for 3 pounds of granola, how do you calculate the unit rate in dollars per pound?

Back

Unit Rate = Total Cost / Total Weight = $3.75 / 3 = $1.25 per pound.

Front

What is simple interest?

Back

Simple interest is calculated using the formula: Interest = Principal x Rate x Time.

Front

If a bank offers 2.5% simple interest on a savings account, how much interest will you earn on a $5,000 deposit after 3 years?

Back

$375 (calculated as 5000 x 0.025 x 3)

Front

What does the term 'whole amount' refer to in percentage calculations?

Back

The whole amount refers to the total or entire quantity from which a part is taken.

Front

If a rate is given as a decimal, how can it be converted to a percentage?

Back

Multiply the decimal by 100 to convert it to a percentage.

Front

What is the relationship between rate, whole amount, and part in percentage problems?

Back

Part = Rate x Whole Amount.

Front

If you have a rate of 0.15, what is the equivalent percentage?

Back

15% (0.15 x 100)