Subtract 7/15 from 42/20
1st number: 2 2/20, 2nd number: 7/15
42/20 - 7/15 is 49/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
7/15 = 7 × 4/15 × 4 = 28/60 - Subtract the two like fractions:
126/60 - 28/60 = 126 - 28/60 = 98/60 - After reducing the fraction, the answer is 49/30
- In mixed form: 119/30
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