Subtract 21/45 from 63/7
1st number: 9 0/7, 2nd number: 21/45
63/7 - 21/45 is 128/15.
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,
63/7 = 63 × 45/7 × 45 = 2835/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
21/45 = 21 × 7/45 × 7 = 147/315 - Subtract the two like fractions:
2835/315 - 147/315 = 2835 - 147/315 = 2688/315 - After reducing the fraction, the answer is 128/15
- In mixed form: 88/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/7-42/45 63/14-21/45 63/7-21/90 63/7-63/45 63/21-21/45 63/35-21/45 63/49-21/45