Subtract 56/45 from 4/72, Solve 4/72

Subtract 56/45 from 4/72

1^st number: 4/72, 2^nd number: 1 11/45

4/72 - 56/45 is -107/90.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 72 × 5 = 360,
4/72 = 4 × 5/72 × 5 = 20/360
Likewise, for the 2nd fraction, since 45 × 8 = 360,
56/45 = 56 × 8/45 × 8 = 448/360
Subtract the two like fractions:
20/360 - 448/360 = 20 - 448/360 = -428/360
After reducing the fraction, the answer is -107/90

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