Subtract 20/18 from 21/56
1st number: 21/56, 2nd number: 1 2/18
21/56 - 20/18 is -53/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 18 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
21/56 = 21 × 9/56 × 9 = 189/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
20/18 = 20 × 28/18 × 28 = 560/504 - Subtract the two like fractions:
189/504 - 560/504 = 189 - 560/504 = -371/504 - After reducing the fraction, the answer is -53/72
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