Solve for m
m=\frac{100l}{981}
Solve for l
l=\frac{981m}{100}
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9.81m=l
Swap sides so that all variable terms are on the left hand side.
\frac{9.81m}{9.81}=\frac{l}{9.81}
Divide both sides of the equation by 9.81, which is the same as multiplying both sides by the reciprocal of the fraction.
m=\frac{l}{9.81}
Dividing by 9.81 undoes the multiplication by 9.81.
m=\frac{100l}{981}
Divide l by 9.81 by multiplying l by the reciprocal of 9.81.
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