Subtract 84/63 from 3/18
1st number: 3/18, 2nd number: 1 21/63
3/18 - 84/63 is -7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
84/63 = 84 × 2/63 × 2 = 168/126 - Subtract the two like fractions:
21/126 - 168/126 = 21 - 168/126 = -147/126 - After reducing the fraction, the answer is -7/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-84/63 3/36-84/63 9/18-84/63 3/54-84/63 15/18-84/63 3/90-84/63 21/18-84/63