40/100 = 0.4
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40% of a number equates to 40/100 and this can be simplified to 4/10 = 2/5.
Multiply the number by the percent in decimal form. Example: 15 percent of 40 would be 40 x .15 = 6. (15 percent of 40 is 6).
To convert 40% (or any percent) to a decimal divide by 100: 40% ÷ 100 = 0.4
No but it can be changed into a decimal: 33/40 = 0.825
40%= .4 or .40