Subtract 81/7 from 42/36
1st number: 1 6/36, 2nd number: 11 4/7
42/36 - 81/7 is -437/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
42/36 = 42 × 7/36 × 7 = 294/252 - Likewise, for the 2nd fraction, since 7 × 36 = 252,
81/7 = 81 × 36/7 × 36 = 2916/252 - Subtract the two like fractions:
294/252 - 2916/252 = 294 - 2916/252 = -2622/252 - After reducing the fraction, the answer is -437/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36-81/7 42/72-81/7 42/36-81/14 42/36-81/21 42/36-81/35 42/36-81/49