Subtract 28/36 from 25/42
25/42 - 28/36 is -23/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
25/42 = 25 × 6/42 × 6 = 150/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
28/36 = 28 × 7/36 × 7 = 196/252 - Subtract the two like fractions:
150/252 - 196/252 = 150 - 196/252 = -46/252 - After reducing the fraction, the answer is -23/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-28/36 25/42-56/36 25/84-28/36 25/42-28/72 75/42-28/36 25/42-84/36