Subtract 42/16 from 20/18
1st number: 1 2/18, 2nd number: 2 10/16
20/18 - 42/16 is -109/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 18 × 8 = 144,
20/18 = 20 × 8/18 × 8 = 160/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
42/16 = 42 × 9/16 × 9 = 378/144 - Subtract the two like fractions:
160/144 - 378/144 = 160 - 378/144 = -218/144 - After reducing the fraction, the answer is -109/72
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