12 is 30 percent of
\(x-\ number\\\\ 30\%=\frac{12}{x}\ \ \ \ | multiply\ by\ x\ \ and\ \ \ x eq 0\\\\ 30\%x=12\\\\ \frac{30}{100}x=12\\\\ 0.3x=12\ \ \ \ | divide\ by\ 0.3\\\\ x=40\\\\ 12\ is\ 30\%\ of\ 40.\)
letx-----------> the numberwe 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 isthe number is \(40\)
