Understand the problem: Understand what is being asked.We need to calculate 10 percent of 200. To find a percentage of a number, we multiply the number by the percentage expressed as a decimal.
Convert to decimal: Convert the percentage to a decimal.10 percent as a decimal is 0.10 (since 10%=10010=0.10).
Multiply decimal by number: Multiply the decimal by the number.Now we multiply 0.10 by 200 to find 10 percent of 200.0.10×200=20