Solve for x
x=\frac{21}{800}=0.02625
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5x=\frac{7}{20}\times \frac{3}{8}
Multiply both sides by \frac{3}{8}.
5x=\frac{7\times 3}{20\times 8}
Multiply \frac{7}{20} times \frac{3}{8} by multiplying numerator times numerator and denominator times denominator.
5x=\frac{21}{160}
Do the multiplications in the fraction \frac{7\times 3}{20\times 8}.
x=\frac{\frac{21}{160}}{5}
Divide both sides by 5.
x=\frac{21}{160\times 5}
Express \frac{\frac{21}{160}}{5} as a single fraction.
x=\frac{21}{800}
Multiply 160 and 5 to get 800.
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