200
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30% of 40 is equal to 30 X 40 / 100 = 12 25% of 20 is equal to 25 X 20 / 100 = 5 answer together is 30X40+25X20 / 100 = 17
40/100 or 20/50 or 2/5th
40%= 40/100 (or 8/20 and 2/5)= .4
A number "m" plus 40 equals 60. Therefore, 60 minus 40 equals m. m therefore equals 20.
40% x * 20 = 8 divide both sides by 20 end up with .4 as your answer. multiply * 100 = 40 %