Subtract 21/56 from 3/36
3/36 - 21/56 is -7/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 36 × 14 = 504,
3/36 = 3 × 14/36 × 14 = 42/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
21/56 = 21 × 9/56 × 9 = 189/504 - Subtract the two like fractions:
42/504 - 189/504 = 42 - 189/504 = -147/504 - After reducing the fraction, the answer is -7/24
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