Subtract 42/20 from 21/6
1st number: 3 3/6, 2nd number: 2 2/20
21/6 - 42/20 is 7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Subtract the two like fractions:
210/60 - 126/60 = 210 - 126/60 = 84/60 - After reducing the fraction, the answer is 7/5
- In mixed form: 12/5
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