42 is 21% of what number?

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Answer 1 · 2018-05-31T22:50:11

$200$

Finding the answer is similar to finding $21%$ of $42$ .

First:

$42/x = 21/100$

Then you want to cross multiply:

$42 xx 100 = 21 xx x$

$(42 xx 100)/21 = x$

$4200/21 = x$

$200 = x$

The answer is $200$ .

Answer 2 · 2018-06-01T00:14:50

$200$

Let the number be $x$ .

Then we have:

$21%*x=42$

$0.21*x=42$

$x=42/0.21$

$=200$

So, the number is $200$ .