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#.