Subtract 72/28 from 1/21
1st number: 1/21, 2nd number: 2 16/28
1/21 - 72/28 is -53/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Subtract the two like fractions:
4/84 - 216/84 = 4 - 216/84 = -212/84 - After reducing the fraction, the answer is -53/21
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