Subtract 80/40 from 80/72
1st number: 1 8/72, 2nd number: 2 0/40
80/72 - 80/40 is -8/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
80/72 = 80 × 5/72 × 5 = 400/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
80/40 = 80 × 9/40 × 9 = 720/360 - Subtract the two like fractions:
400/360 - 720/360 = 400 - 720/360 = -320/360 - After reducing the fraction, the answer is -8/9
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