Subtract 25/45 from 3/7
3/7 - 25/45 is -8/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
3/7 = 3 × 45/7 × 45 = 135/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Subtract the two like fractions:
135/315 - 175/315 = 135 - 175/315 = -40/315 - After reducing the fraction, the answer is -8/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-25/45 3/7-50/45 3/14-25/45 3/7-25/90 9/7-25/45 3/7-75/45 3/21-25/45 15/7-25/45 3/35-25/45 21/7-25/45 3/49-25/45