Subtract 81/20 from 70/30
1st number: 2 10/30, 2nd number: 4 1/20
70/30 - 81/20 is -103/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
70/30 = 70 × 2/30 × 2 = 140/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
81/20 = 81 × 3/20 × 3 = 243/60 - Subtract the two like fractions:
140/60 - 243/60 = 140 - 243/60 = -103/60
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