Subtract 21/30 from 42/20
1st number: 2 2/20, 2nd number: 21/30
42/20 - 21/30 is 7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 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 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Subtract the two like fractions:
126/60 - 42/60 = 126 - 42/60 = 84/60 - After reducing the fraction, the answer is 7/5
- In mixed form: 12/5
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