Subtract 42/35 from 45/20
1st number: 2 5/20, 2nd number: 1 7/35
45/20 - 42/35 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
42/35 = 42 × 4/35 × 4 = 168/140 - Subtract the two like fractions:
315/140 - 168/140 = 315 - 168/140 = 147/140 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
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