Question

find each percent of a number.
30% of 40
15% of 38
50% of 86
75% of 160

1. 24% of 35
2. 2% of 74

Explanation:

1. 30% of 40

Step1: Convert percentage to decimal

To find a percentage of a number, we first convert the percentage to a decimal by dividing by 100. So, \( 30\% = \frac{30}{100}=0.3 \)

Step2: Multiply by the number

Now, multiply this decimal by the number 40. So, \( 0.3\times40 = 12 \)

Step1: Convert percentage to decimal

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

Step2: Multiply by the number

Multiply 0.75 by 160: \( 0.75\times160=120 \)

Step1: Convert percentage to decimal

\( 15\%=\frac{15}{100}=0.15 \)

Step2: Multiply by the number

\( 0.15\times38 = 5.7 \)

Answer:

12

2. 75% of 160