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\frac{1}{500}x\times 400=11.2
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
\frac{400}{500}x=11.2
Multiply \frac{1}{500} and 400 to get \frac{400}{500}.
\frac{4}{5}x=11.2
Reduce the fraction \frac{400}{500} to lowest terms by extracting and canceling out 100.
x=11.2\times \frac{5}{4}
Multiply both sides by \frac{5}{4}, the reciprocal of \frac{4}{5}.
x=\frac{56}{5}\times \frac{5}{4}
Convert decimal number 11.2 to fraction \frac{112}{10}. Reduce the fraction \frac{112}{10} to lowest terms by extracting and canceling out 2.
x=\frac{56\times 5}{5\times 4}
Multiply \frac{56}{5} times \frac{5}{4} by multiplying numerator times numerator and denominator times denominator.
x=\frac{56}{4}
Cancel out 5 in both numerator and denominator.
x=14
Divide 56 by 4 to get 14.