Subtract 45/35 from 20/42
1st number: 20/42, 2nd number: 1 10/35
20/42 - 45/35 is -17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
45/35 = 45 × 6/35 × 6 = 270/210 - Subtract the two like fractions:
100/210 - 270/210 = 100 - 270/210 = -170/210 - After reducing the fraction, the answer is -17/21
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