IM 7th Grade Unit 4 Review

Front

What is the formula to calculate a percentage increase?

Back

To calculate a percentage increase, use the formula: New Value = Original Value × (1 + Percentage Increase).

Front

If a population increases by 40%, what decimal represents this increase?

Back

1.4

Front

How do you calculate the final price after applying a discount?

Back

Final Price = Original Price × (1 - Discount Rate).

Front

If Tony bought a sweatshirt for $48 with a 10% discount, how much did he pay?

Back

Tony paid $48 × (1 - 0.10) = $43.20.

Front

What is the equation to find the number of text messages sent today if yesterday 30 messages were sent and today is 15% more?

Back

y = 1.15 × 30.

Front

How do you find the number of items after a percentage decrease?

Back

New Quantity = Original Quantity × (1 - Percentage Decrease).

Front

If a store had 60 phones and decreased by 25%, how many phones are left?

Back

60 × (1 - 0.25) = 45 phones.

Front

What is the equation to find last year's price if the current price is $80 and it represents a 10% increase?

Back

80 = 1.10 × x.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100 (e.g., 10% = 0.10).

Front

What does it mean if a price increases by 10%?

Back

It means the new price is 110% of the original price.