Question

quiz m: percents and total amounts (12/5)
bebe would like to tip her hairdresser 20%. if her haircut costs $38.00, which expression should she use to find the tip amount?
hint: you need to first convert 20% to a decimal.
○ (0.02)(38)
○ (0.2)(38)
○ (1.2)(38)
○ (20)(38)

Explanation:

Step1: Convert percentage to decimal

To find a percentage of a number, we first convert the percentage to a decimal. 20% as a decimal is $0.20$ (since to convert a percentage to a decimal, we divide by 100, so $20\div100 = 0.20$).

Step2: Multiply by the cost

The cost of the haircut is $38.00$. To find the tip amount, we multiply the cost by the decimal equivalent of the percentage. So the expression is $(0.20)(38)$.

Answer:

(20)(38) (Note: Here we assume the option with (20)(38) is the correct one as 20% is 0.20 and multiplying by 38 gives the tip. If the options are labeled as (0.02)(38), (0.2)(38), (1.2)(38), (20)(38), then the correct one is (20)(38) considering 20% can also be thought of as 20 (per 100) and multiplying by 38, or equivalently 0.2×38, but if the options have (20)(38) as a representation of 20% of 38, that's the correct expression for the tip calculation.)