Subtract 63/45 from 8/7
1st number: 1 1/7, 2nd number: 1 18/45
8/7 - 63/45 is -9/35.
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,
8/7 = 8 × 45/7 × 45 = 360/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
63/45 = 63 × 7/45 × 7 = 441/315 - Subtract the two like fractions:
360/315 - 441/315 = 360 - 441/315 = -81/315 - After reducing the fraction, the answer is -9/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-63/45 8/14-63/45 8/7-63/90 24/7-63/45 8/21-63/45 40/7-63/45 8/35-63/45 56/7-63/45 8/49-63/45