Subtract 21/27 from 4/72
4/72 - 21/27 is -13/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 27 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 72 × 3 = 216,
4/72 = 4 × 3/72 × 3 = 12/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Subtract the two like fractions:
12/216 - 168/216 = 12 - 168/216 = -156/216 - After reducing the fraction, the answer is -13/18
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