Subtract 80/7 from 20/72
1st number: 20/72, 2nd number: 11 3/7
20/72 - 80/7 is -1405/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Likewise, for the 2nd fraction, since 7 × 72 = 504,
80/7 = 80 × 72/7 × 72 = 5760/504 - Subtract the two like fractions:
140/504 - 5760/504 = 140 - 5760/504 = -5620/504 - After reducing the fraction, the answer is -1405/126
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