Subtract 7/9 from 25/42
25/42 - 7/9 is -23/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
25/42 = 25 × 3/42 × 3 = 75/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
7/9 = 7 × 14/9 × 14 = 98/126 - Subtract the two like fractions:
75/126 - 98/126 = 75 - 98/126 = -23/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-7/9 25/42-14/9 25/84-7/9 25/42-7/18 75/42-7/9 25/42-21/9 25/42-7/27 25/42-35/9 25/42-7/45 25/42-49/9 25/42-7/63