Subtract 7/42 from 28/36
28/36 - 7/42 is 11/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
28/36 = 28 × 7/36 × 7 = 196/252 - Likewise, for the 2nd fraction, since 42 × 6 = 252,
7/42 = 7 × 6/42 × 6 = 42/252 - Subtract the two like fractions:
196/252 - 42/252 = 196 - 42/252 = 154/252 - After reducing the fraction, the answer is 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/36-7/42 28/36-14/42 28/72-7/42 28/36-7/84 84/36-7/42 28/36-21/42 28/36-35/42 28/36-49/42