Subtract 35/18 from 42/84
1st number: 42/84, 2nd number: 1 17/18
42/84 - 35/18 is -13/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
42/84 = 42 × 3/84 × 3 = 126/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
35/18 = 35 × 14/18 × 14 = 490/252 - Subtract the two like fractions:
126/252 - 490/252 = 126 - 490/252 = -364/252 - After reducing the fraction, the answer is -13/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84-70/18 42/84-35/36 42/84-35/54 42/84-35/90