Subtract 3/20 from 42/7
1st number: 6 0/7, 2nd number: 3/20
42/7 - 3/20 is 117/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
3/20 = 3 × 7/20 × 7 = 21/140 - Subtract the two like fractions:
840/140 - 21/140 = 840 - 21/140 = 819/140 - After reducing the fraction, the answer is 117/20
- In mixed form: 517/20
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