Subtract 18/72 from 54/70, Solve 54/70

Subtract 18/72 from 54/70

54/70 - 18/72 is 73/140.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 70 × 36 = 2520,
54/70 = 54 × 36/70 × 36 = 1944/2520
Likewise, for the 2nd fraction, since 72 × 35 = 2520,
18/72 = 18 × 35/72 × 35 = 630/2520
Subtract the two like fractions:
1944/2520 - 630/2520 = 1944 - 630/2520 = 1314/2520
After reducing the fraction, the answer is 73/140

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