Subtract 63/7 from 30/18
1st number: 1 12/18, 2nd number: 9 0/7
30/18 - 63/7 is -22/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
63/7 = 63 × 18/7 × 18 = 1134/126 - Subtract the two like fractions:
210/126 - 1134/126 = 210 - 1134/126 = -924/126 - After reducing the fraction, the answer is -22/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-63/7 30/36-63/7 30/18-63/14 90/18-63/7 30/54-63/7 30/18-63/21 30/90-63/7 30/18-63/35 30/18-63/49