Subtract 20/72 from 18/7
1st number: 2 4/7, 2nd number: 20/72
18/7 - 20/72 is 289/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
18/7 = 18 × 72/7 × 72 = 1296/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Subtract the two like fractions:
1296/504 - 140/504 = 1296 - 140/504 = 1156/504 - After reducing the fraction, the answer is 289/126
- In mixed form: 237/126
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