Subtract 14/70 from 28/72, Solve 28/72

Subtract 14/70 from 28/72

28/72 - 14/70 is 17/90.

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

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 72 × 35 = 2520,
28/72 = 28 × 35/72 × 35 = 980/2520
Likewise, for the 2nd fraction, since 70 × 36 = 2520,
14/70 = 14 × 36/70 × 36 = 504/2520
Subtract the two like fractions:
980/2520 - 504/2520 = 980 - 504/2520 = 476/2520
After reducing the fraction, the answer is 17/90

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