Subtract 42/9 from 7/20
1st number: 7/20, 2nd number: 4 6/9
7/20 - 42/9 is -259/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
42/9 = 42 × 20/9 × 20 = 840/180 - Subtract the two like fractions:
63/180 - 840/180 = 63 - 840/180 = -777/180 - After reducing the fraction, the answer is -259/60
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