Subtract 70/72 from 8/28, Solve 8/28

Subtract 70/72 from 8/28

8/28 - 70/72 is -173/252.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 28 × 18 = 504,
8/28 = 8 × 18/28 × 18 = 144/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504
Subtract the two like fractions:
144/504 - 490/504 = 144 - 490/504 = -346/504
After reducing the fraction, the answer is -173/252

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