Subtract 42/20 from 8/16
1st number: 8/16, 2nd number: 2 2/20
8/16 - 42/20 is -8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
8/16 = 8 × 5/16 × 5 = 40/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
42/20 = 42 × 4/20 × 4 = 168/80 - Subtract the two like fractions:
40/80 - 168/80 = 40 - 168/80 = -128/80 - After reducing the fraction, the answer is -8/5
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