7th Grade Math NC Check In 1 Review

Front

What is the process to convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign (%). For example, 0.8 x 100 = 80%.

Front

How do you calculate 10% of a number?

Back

To calculate 10% of a number, multiply the number by 0.10. For example, 10% of 50 is 50 x 0.10 = 5.

Front

What is the constant of proportionality in a linear equation?

Back

The constant of proportionality is the ratio of the dependent variable to the independent variable in a proportional relationship, often represented as 'k' in the equation y = kx.

Front

How can you identify the constant of proportionality from a table of values?

Back

To identify the constant of proportionality from a table, divide the value of the dependent variable (y) by the value of the independent variable (x) for any pair of corresponding values. The result should be the same for all pairs.

Front

What is the formula to find the total cost after applying a discount and sales tax?

Back

Total Cost = (Original Price - Discount) + Sales Tax. First, calculate the discount, subtract it from the original price, then calculate the sales tax on the discounted price and add it.

Front

How do you calculate a percentage discount on an item?

Back

To calculate a percentage discount, multiply the original price by the discount percentage (as a decimal). For example, for a 15% discount on $79.99, calculate 79.99 x 0.15.

Front

What is the formula for calculating sales tax?

Back

Sales Tax = Price of Item x Sales Tax Rate. For example, if the price is $72.75 and the sales tax rate is 7%, then Sales Tax = 72.75 x 0.07.

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio or relationship to each other. This means that as one quantity increases or decreases, the other does so in a consistent manner.

Front

How do you express a fraction as a decimal?

Back

To express a fraction as a decimal, divide the numerator (top number) by the denominator (bottom number). For example, 1/2 = 0.5.

Front

What is the relationship between percentages, decimals, and fractions?

Back

Percentages, decimals, and fractions are different ways to represent the same value. For example, 50% = 0.5 = 1/2.