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kompoz [17]
3 years ago
10

12 is 30 percent of

Mathematics
2 answers:
ehidna [41]3 years ago
4 0
x-\ number\\\\
30\%=\frac{12}{x}\ \ \ \ | multiply\ by\ x\  \ and\ \ \ x \neq 0\\\\
30\%x=12\\\\
\frac{30}{100}x=12\\\\
0.3x=12\ \ \ \ | divide\ by\ 0.3\\\\
x=40\\\\
12\ is\ 30\%\ of\ 40.
sertanlavr [38]3 years ago
4 0
Let
x-----------> the number

we know that
30 % is equal to  \frac{30}{100}
(\frac{30}{100})*x=12
multiply by 100 both sides 
30*x=1200
divide  by 30 both sides
x= \frac{1200}{30} \\ x=40

the answer is
the number is 40
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