Subtract 9/49 from 80/72, Solve 1 8/72

Subtract 9/49 from 80/72

1^st number: 1 8/72, 2^nd number: 9/49

80/72 - 9/49 is 409/441.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 49 is 3528

Next, find the equivalent fraction of both fractional numbers with denominator 3528
For the 1st fraction, since 72 × 49 = 3528,
80/72 = 80 × 49/72 × 49 = 3920/3528
Likewise, for the 2nd fraction, since 49 × 72 = 3528,
9/49 = 9 × 72/49 × 72 = 648/3528
Subtract the two like fractions:
3920/3528 - 648/3528 = 3920 - 648/3528 = 3272/3528
After reducing the fraction, the answer is 409/441

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