Subtract 21/28 from 21/5
1st number: 4 1/5, 2nd number: 21/28
21/5 - 21/28 is 69/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
21/5 = 21 × 28/5 × 28 = 588/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Subtract the two like fractions:
588/140 - 105/140 = 588 - 105/140 = 483/140 - After reducing the fraction, the answer is 69/20
- In mixed form: 39/20
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