Subtract 4/10 from 4/72, Solve 4/72

Subtract 4/10 from 4/72

4/72 - 4/10 is -31/90.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 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 10 × 36 = 360,
4/10 = 4 × 36/10 × 36 = 144/360
Subtract the two like fractions:
20/360 - 144/360 = 20 - 144/360 = -124/360
After reducing the fraction, the answer is -31/90

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