Subtract 18/7 from 20/36
1st number: 20/36, 2nd number: 2 4/7
20/36 - 18/7 is -127/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
18/7 = 18 × 36/7 × 36 = 648/252 - Subtract the two like fractions:
140/252 - 648/252 = 140 - 648/252 = -508/252 - After reducing the fraction, the answer is -127/63
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