Subtract 7/20 from 42/30
1st number: 1 12/30, 2nd number: 7/20
42/30 - 7/20 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
42/30 = 42 × 2/30 × 2 = 84/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
7/20 = 7 × 3/20 × 3 = 21/60 - Subtract the two like fractions:
84/60 - 21/60 = 84 - 21/60 = 63/60 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
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