Math Review 2

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you calculate the percentage of correct answers on a test?

Back

To calculate the percentage of correct answers, divide the number of correct answers by the total number of questions and multiply by 100.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) in the equation y = kx, which shows the relationship between two proportional quantities.

Front

How do you find the scale factor between two similar figures?

Back

The scale factor is found by dividing the length of a side of one figure by the corresponding length of a side of the other figure.

Front

What is percent of change?

Back

Percent of change is a way to express the change in a quantity as a percentage of the original amount, calculated as (new value - old value) / old value * 100.

Front

If a tree's height is 15 ft, what is its height in inches?

Back

15 ft is equal to 180 inches (since 1 ft = 12 inches, 15 ft x 12 = 180 inches).

Front

What does it mean if two quantities are proportional?

Back

Two quantities are proportional if they maintain a constant ratio or relationship to each other.

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor.

Front

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

Back

The area of a rectangle is found using the formula: Area = length x width.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100.