Subtract 28/10 from 21/7
1st number: 3 0/7, 2nd number: 2 8/10
21/7 - 28/10 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
28/10 = 28 × 7/10 × 7 = 196/70 - Subtract the two like fractions:
210/70 - 196/70 = 210 - 196/70 = 14/70 - After reducing the fraction, the answer is 1/5
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