Question

find each percent of a number.

1. 30% of 40
2. 15% of 38
3. 50% of 86
4. 75% of 160
5. 24% of 35
6. 2% of 74

Explanation:

Problem 39: 30% of 40

Step 1: 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% becomes $30\div100 = 0.3$.

Step 2: Multiply the decimal by the number

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

Step 1: Convert percentage to decimal

Convert 15% to a decimal: $15\div100 = 0.15$.

Step 2: Multiply the decimal by the number

Multiply 0.15 by 38: $0.15\times38 = 5.7$.

Step 1: Convert percentage to decimal

50% as a decimal is $50\div100 = 0.5$.

Step 2: Multiply the decimal by the number

Multiply 0.5 by 86: $0.5\times86 = 43$.

Answer:

12

Problem 40: 15% of 38