Subtract 70/90 from 81/60
1st number: 1 21/60, 2nd number: 70/90
81/60 - 70/90 is 103/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
81/60 = 81 × 3/60 × 3 = 243/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Subtract the two like fractions:
243/180 - 140/180 = 243 - 140/180 = 103/180
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