Math 7 - Envision - Topic 3 Review

Front

What is the formula for simple interest?

Back

I = P * r * t, where I is the interest, P is the principal amount, r is the rate of interest, and t is the time in years.

Front

How do you calculate the percent of empty seats in a theater?

Back

Percent of empty seats = (Number of empty seats / Total seats) * 100.

Front

What is the formula for percent of change?

Back

Percent of change = ((New value - Old value) / Old value) * 100.

Front

If a jacket costs $85 and is on sale for 40% off, how do you calculate the sale price?

Back

Sale price = Original price - (Original price * Discount rate). In this case, Sale price = $85 - ($85 * 0.40) = $51.

Front

What does it mean if 26 is 5% of a number?

Back

It means that 26 is equal to 5% of that number, which can be calculated as Number = 26 / 0.05 = 520.

Front

Define simple interest.

Back

Simple interest is the interest calculated on the principal amount only, without compounding.

Front

What is the difference between percent increase and percent decrease?

Back

Percent increase measures how much a value has grown compared to its original value, while percent decrease measures how much a value has shrunk.

Front

How do you find the total number of seats sold if you know the total seats and the percent sold?

Back

Total seats sold = Total seats * (Percent sold / 100).

Front

What is the meaning of 'discount' in shopping?

Back

A discount is a reduction in the price of a product or service.

Front

How do you convert a fraction to a percent?

Back

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