Question

problems 9–11: spiral review
calculate each percentage.
25% of 400
75% of 200
5% of 9000

Explanation:

25% of 400

Step1: Convert percentage to decimal

To find a percentage of a number, first convert the percentage to a decimal by dividing by 100. So, \( 25\% = \frac{25}{100}=0.25 \).

Step2: Multiply by the number

Now, multiply this decimal by 400. So, \( 0.25\times400 = 100 \).

Step1: Convert percentage to decimal

Convert 75% to a decimal: \( 75\%=\frac{75}{100} = 0.75 \).

Step2: Multiply by the number

Multiply 0.75 by 200: \( 0.75\times200=150 \).

Step1: Convert percentage to decimal

Convert 5% to a decimal: \( 5\%=\frac{5}{100}=0.05 \).

Step2: Multiply by the number

Multiply 0.05 by 9000: \( 0.05\times9000 = 450 \).

Answer:

100

75% of 200