Subtract 10/50 from 20/72, Solve 20/72

Subtract 10/50 from 20/72

20/72 - 10/50 is 7/90.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 50 is 1800

Next, find the equivalent fraction of both fractional numbers with denominator 1800
For the 1st fraction, since 72 × 25 = 1800,
20/72 = 20 × 25/72 × 25 = 500/1800
Likewise, for the 2nd fraction, since 50 × 36 = 1800,
10/50 = 10 × 36/50 × 36 = 360/1800
Subtract the two like fractions:
500/1800 - 360/1800 = 500 - 360/1800 = 140/1800
After reducing the fraction, the answer is 7/90

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