We know that 40% of 100 is 40. Using that information we can divide 40 by 100 and get our percentage in a decimal format: 40/100 = 0.4 and that is our answer: 0.4
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Written as a decimal fraction, 40 percent is equal to 0.4.Written as a vulgar fraction, 40 percent is equal to 4/10, which can be read either as "four over ten" or "four tenths".
To convert 40% (or any percent) to a decimal divide by 100: 40% ÷ 100 = 0.4
40%= .4 or .40
40% = 0.4
40% = 0.40