10 percent of 88 is 8.8.

In general, we find y% of a number, x, by multiplying x by y% in decimal form. To put a percent in decimal form, we move the decimal point two units to the left and remove the percent symbol. If we do this for 10%, we get that 10% in decimal form is 0.10. This makes 10% a special case in that multiplying any number, x, by 0.10 simply moves the decimal in x one place to the left. This leads to the following rule for calculating 10% of a number x.

• To find 10% of a number x, we simply move the decimal in x one unit to the left.

Therefore, to find 10% of 88, we just move the decimal in 88 one unit to the left to get 8.8.