Subtract 12/63 from 9/7
1st number: 1 2/7, 2nd number: 12/63
9/7 - 12/63 is 23/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
9/7 = 9 × 9/7 × 9 = 81/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
12/63 = 12 × 1/63 × 1 = 12/63 - Subtract the two like fractions:
81/63 - 12/63 = 81 - 12/63 = 69/63 - After reducing the fraction, the answer is 23/21
- In mixed form: 12/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/7-12/63 9/7-24/63 9/14-12/63 27/7-12/63 9/7-36/63 9/21-12/63 45/7-12/63 9/7-60/63 9/35-12/63 63/7-12/63 9/7-84/63 9/49-12/63