Subtract 81/8 from 80/30
1st number: 2 20/30, 2nd number: 10 1/8
80/30 - 81/8 is -179/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
80/30 = 80 × 4/30 × 4 = 320/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
81/8 = 81 × 15/8 × 15 = 1215/120 - Subtract the two like fractions:
320/120 - 1215/120 = 320 - 1215/120 = -895/120 - After reducing the fraction, the answer is -179/24
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