Subtract 20/54 from 10/72
10/72 - 20/54 is -25/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 54 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
10/72 = 10 × 3/72 × 3 = 30/216 - Likewise, for the 2nd fraction, since 54 × 4 = 216,
20/54 = 20 × 4/54 × 4 = 80/216 - Subtract the two like fractions:
30/216 - 80/216 = 30 - 80/216 = -50/216 - After reducing the fraction, the answer is -25/108
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