Subtract 42/5 from 45/20
1st number: 2 5/20, 2nd number: 8 2/5
45/20 - 42/5 is -123/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
45/20 = 45 × 1/20 × 1 = 45/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
42/5 = 42 × 4/5 × 4 = 168/20 - Subtract the two like fractions:
45/20 - 168/20 = 45 - 168/20 = -123/20
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