Subtract 18/20 from 45/28
1st number: 1 17/28, 2nd number: 18/20
45/28 - 18/20 is 99/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
45/28 = 45 × 5/28 × 5 = 225/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Subtract the two like fractions:
225/140 - 126/140 = 225 - 126/140 = 99/140
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