40 percent of 42:

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How to calculate how much will be 40 percent of the 42? The correct answer is:
16.8
The solution is as follows: We make a proportion -
42 is 100 percent.
??? (X - the desired number) is 40 percent
What is 40% of 42?
Solution: 40 * 42 / 100 = 16.8


Other examples of calculating interest on an amount:
40% of 10 = 4 (remains: 6)
 40% of 16 = 6.4 (remains: 9.6)
40% of 108 = 43.2 (remains: 64.8)
 40% of 235 = 94 (remains: 141)
30% of 2 = 0.6 (remains: 1.4)
 30% of 27 = 8.1 (remains: 18.9)
30% of 103 = 30.9 (remains: 72.1)
 30% of 193 = 57.9 (remains: 135.1)
66% of 189 = 124.74 (remains: 64.26)
 66% of 402 = 265.32 (remains: 136.68)
66% of 619 = 408.54 (remains: 210.46)
 66% of 8688 = 5734.08 (remains: 2953.92)


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