... 30 divided by 100 = .30 so .30 x 43 = 12.9 so 12.9 is 30 percent of 42.
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The answer above is answering the wrong question - it answers "What is 30% of 42?"
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30/42 = 0.714286 = 71.4286% - so 30 is 71.4286% of 42.
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42 140 x 0.7
42
Subtracting 30 percent off a value is the same as multiplying the value by 1-(30/100) = 0.7. In this instance, 0.7 x 60 = 42 Therefore, 30 percent off 60 dollars is equal to 42 dollars.
2.31/42 x 100 = 5.5 percent.
42 percent of 150 is 0.42*150 or 63. And conversely, 150% of 42 is 63 as well.