40% = 2/5
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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".
The simplest fraction here is two fifths.
40/100 or 20/50 or 2/5th
40% = 0.4 and 2⁄5
Expressed as a proper fraction in its simplest form, 77.5 percent is equal to 31/40 or thirty-one fortieths.