Subtract 70/72 from 5/7, Solve 5/7

Subtract 70/72 from 5/7

5/7 - 70/72 is -65/252.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 7 × 72 = 504,
5/7 = 5 × 72/7 × 72 = 360/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504
Subtract the two like fractions:
360/504 - 490/504 = 360 - 490/504 = -130/504
After reducing the fraction, the answer is -65/252

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