30% of what number is 7.5??

30% of a number is 7.5 can be written as an equation.

30% can be rewritten as 0.30, or even 0.3.

a number can be written as "x".

So far, we have 0.3x.

"is" is a keyword for "equal".

0.3x=

It says "is 7.5".

0.3x=7.5

We can solve this equation.

0.3x=7.5

/0.3   /0.3

x=25

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hope it helps

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: