Subtract 21/15 from 84/28
1st number: 3 0/28, 2nd number: 1 6/15
84/28 - 21/15 is 8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
84/28 = 84 × 15/28 × 15 = 1260/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
21/15 = 21 × 28/15 × 28 = 588/420 - Subtract the two like fractions:
1260/420 - 588/420 = 1260 - 588/420 = 672/420 - After reducing the fraction, the answer is 8/5
- In mixed form: 13/5
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