Subtract 40/70 from 20/36
20/36 - 40/70 is -1/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
20/36 = 20 × 35/36 × 35 = 700/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
40/70 = 40 × 18/70 × 18 = 720/1260 - Subtract the two like fractions:
700/1260 - 720/1260 = 700 - 720/1260 = -20/1260 - After reducing the fraction, the answer is -1/63
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