Subtract 5/7 from 9/20
9/20 - 5/7 is -37/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
5/7 = 5 × 20/7 × 20 = 100/140 - Subtract the two like fractions:
63/140 - 100/140 = 63 - 100/140 = -37/140
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