SOLUTION: 42 is 40% of what number?

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Question 141354: 42 is 40% of what number?
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
This is the same as making the following equation:
42=.4x
or in words
42 is 40% (.4) of what number (x)?
We can solve this simply without a calculator:
42=%282%2F5%29x
42%285%2F2%29=x
21%285%29=x
105=x
Check:
105*2/5=210/5=42