Subtract 21/28 from 72/10
1st number: 7 2/10, 2nd number: 21/28
72/10 - 21/28 is 129/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 10 × 14 = 140,
72/10 = 72 × 14/10 × 14 = 1008/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Subtract the two like fractions:
1008/140 - 105/140 = 1008 - 105/140 = 903/140 - After reducing the fraction, the answer is 129/20
- In mixed form: 69/20
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