7th grade math STAAR review (proportional reasoning set)

Front

What is the formula to convert inches to centimeters?

Back

To convert inches to centimeters, multiply the number of inches by 2.54.

Front

How do you calculate the percentage of a total?

Back

To calculate the percentage of a total, divide the part by the whole and multiply by 100.

Front

What is 25% of 1200?

Back

25% of 1200 is 300.

Front

How do you find the reduction percentage of a price?

Back

To find the reduction percentage, subtract the new price from the original price, divide by the original price, and multiply by 100.

Front

What is the equation of a line in slope-intercept form?

Back

The equation of a line in slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

If a video game costs $60 and is reduced to $45, what is the amount of reduction?

Back

The amount of reduction is $60 - $45 = $15.

Front

How do you find the total number of items based on a percentage?

Back

To find the total number of items based on a percentage, divide the number of items by the percentage (in decimal form).

Front

What is the total space taken by 264 pictures if each takes up 2 MB?

Back

The total space taken is 264 pictures * 2 MB/picture = 528 MB.

Front

How many megabytes do 35 pictures take up if 264 pictures take up 528 MB?

Back

Each picture takes up 2 MB, so 35 pictures take up 35 * 2 = 70 MB.

Front

What is the relationship between x and y in the equation y = 6x - 5?

Back

In this equation, y increases by 6 for every 1 increase in x, and when x is 0, y is -5.