Subtract 21/20 from 42/14
1st number: 3 0/14, 2nd number: 1 1/20
42/14 - 21/20 is 39/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
42/14 = 42 × 10/14 × 10 = 420/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
21/20 = 21 × 7/20 × 7 = 147/140 - Subtract the two like fractions:
420/140 - 147/140 = 420 - 147/140 = 273/140 - After reducing the fraction, the answer is 39/20
- In mixed form: 119/20
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