Solve for m
m=0.7
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\frac{0.21}{0.3}=m
Divide both sides by 0.3.
\frac{21}{30}=m
Expand \frac{0.21}{0.3} by multiplying both numerator and the denominator by 100.
\frac{7}{10}=m
Reduce the fraction \frac{21}{30} to lowest terms by extracting and canceling out 3.
m=\frac{7}{10}
Swap sides so that all variable terms are on the left hand side.
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