Subtract 20/36 from 20/70
20/70 - 20/36 is -17/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 70 × 18 = 1260,
20/70 = 20 × 18/70 × 18 = 360/1260 - Likewise, for the 2nd fraction, since 36 × 35 = 1260,
20/36 = 20 × 35/36 × 35 = 700/1260 - Subtract the two like fractions:
360/1260 - 700/1260 = 360 - 700/1260 = -340/1260 - After reducing the fraction, the answer is -17/63
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