Subtract 21/14 from 45/20
1st number: 2 5/20, 2nd number: 1 7/14
45/20 - 21/14 is 3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 14 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 14 × 10 = 140,
21/14 = 21 × 10/14 × 10 = 210/140 - Subtract the two like fractions:
315/140 - 210/140 = 315 - 210/140 = 105/140 - After reducing the fraction, the answer is 3/4
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