Subtract 40/63 from 3/18
3/18 - 40/63 is -59/126.
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,
40/63 = 40 × 2/63 × 2 = 80/126 - Subtract the two like fractions:
21/126 - 80/126 = 21 - 80/126 = -59/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-40/63 3/18-80/63 3/36-40/63 9/18-40/63 3/54-40/63 15/18-40/63 3/90-40/63 21/18-40/63