Subtract 21/27 from 25/72
25/72 - 21/27 is -31/72.
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,
25/72 = 25 × 3/72 × 3 = 75/216 - Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216 - Subtract the two like fractions:
75/216 - 168/216 = 75 - 168/216 = -93/216 - After reducing the fraction, the answer is -31/72
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