Subtract 75/45 from 3/7
1st number: 3/7, 2nd number: 1 30/45
3/7 - 75/45 is -26/21.
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,
75/45 = 75 × 7/45 × 7 = 525/315 - Subtract the two like fractions:
135/315 - 525/315 = 135 - 525/315 = -390/315 - After reducing the fraction, the answer is -26/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-75/45 3/14-75/45 3/7-75/90 9/7-75/45 3/21-75/45 15/7-75/45 3/35-75/45 21/7-75/45 3/49-75/45