Subtract 25/7 from 15/45
1st number: 15/45, 2nd number: 3 4/7
15/45 - 25/7 is -68/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
25/7 = 25 × 45/7 × 45 = 1125/315 - Subtract the two like fractions:
105/315 - 1125/315 = 105 - 1125/315 = -1020/315 - After reducing the fraction, the answer is -68/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/45-25/7 15/45-50/7 15/90-25/7 15/45-25/14 15/45-75/7 15/45-25/21 75/45-25/7 15/45-25/35 15/45-25/49