Subtract 20/15 from 81/20
1st number: 4 1/20, 2nd number: 1 5/15
81/20 - 20/15 is 163/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
81/20 = 81 × 3/20 × 3 = 243/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
20/15 = 20 × 4/15 × 4 = 80/60 - Subtract the two like fractions:
243/60 - 80/60 = 243 - 80/60 = 163/60 - In mixed form: 243/60
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