Subtract 28/72 from 7/84
7/84 - 28/72 is -11/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
7/84 = 7 × 6/84 × 6 = 42/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504 - Subtract the two like fractions:
42/504 - 196/504 = 42 - 196/504 = -154/504 - After reducing the fraction, the answer is -11/36
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