7th Grade Math PSSA Review

Front

What is the formula to calculate the percentage of a number?

Back

Percentage = (Part / Whole) * 100

Front

If fingernails grow at a rate of 1.5 inches per year, how do you calculate the time to reach a certain length?

Back

Time (years) = Desired Length (inches) / Growth Rate (inches per year)

Front

How do you determine the amount of an ingredient needed when scaling a recipe?

Back

New Amount = (Desired Yield / Original Yield) * Original Amount

Front

What is the relationship between the dimensions of similar shapes?

Back

The ratio of corresponding dimensions of similar shapes is constant.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How do you convert a fraction to a percentage?

Back

Percentage = (Fraction * 100)%

Front

What is the formula for finding the area of a rectangle?

Back

Area = Length * Width

Front

How do you find the scale factor when resizing a shape?

Back

Scale Factor = New Dimension / Original Dimension

Front

What is the difference between acute, right, and obtuse angles?

Back

Acute angles are less than 90 degrees, right angles are exactly 90 degrees, and obtuse angles are greater than 90 degrees but less than 180 degrees.

Front

How do you calculate the total cost if you know the price per item and the quantity?

Back

Total Cost = Price per Item * Quantity