Subtract 42/30 from 20/80
1st number: 20/80, 2nd number: 1 12/30
20/80 - 42/30 is -23/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
20/80 = 20 × 3/80 × 3 = 60/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
42/30 = 42 × 8/30 × 8 = 336/240 - Subtract the two like fractions:
60/240 - 336/240 = 60 - 336/240 = -276/240 - After reducing the fraction, the answer is -23/20
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