Subtract 7/10 from 30/72, Solve 30/72

Subtract 7/10 from 30/72

30/72 - 7/10 is -17/60.

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,
30/72 = 30 × 5/72 × 5 = 150/360
Likewise, for the 2nd fraction, since 10 × 36 = 360,
7/10 = 7 × 36/10 × 36 = 252/360
Subtract the two like fractions:
150/360 - 252/360 = 150 - 252/360 = -102/360
After reducing the fraction, the answer is -17/60

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