Subtract 8/28 from 21/20
1st number: 1 1/20, 2nd number: 8/28
21/20 - 8/28 is 107/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
8/28 = 8 × 5/28 × 5 = 40/140 - Subtract the two like fractions:
147/140 - 40/140 = 147 - 40/140 = 107/140
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