Subtract 3/28 from 21/18
1st number: 1 3/18, 2nd number: 3/28
21/18 - 3/28 is 89/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
21/18 = 21 × 14/18 × 14 = 294/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
3/28 = 3 × 9/28 × 9 = 27/252 - Subtract the two like fractions:
294/252 - 27/252 = 294 - 27/252 = 267/252 - After reducing the fraction, the answer is 89/84
- In mixed form: 15/84
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