Subtract 8/72 from 8/20
8/20 - 8/72 is 13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
8/20 = 8 × 18/20 × 18 = 144/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
8/72 = 8 × 5/72 × 5 = 40/360 - Subtract the two like fractions:
144/360 - 40/360 = 144 - 40/360 = 104/360 - After reducing the fraction, the answer is 13/45
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