Subtract 42/18 from 40/63
1st number: 40/63, 2nd number: 2 6/18
40/63 - 42/18 is -107/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
40/63 = 40 × 2/63 × 2 = 80/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126 - Subtract the two like fractions:
80/126 - 294/126 = 80 - 294/126 = -214/126 - After reducing the fraction, the answer is -107/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63-42/18 40/63-84/18 40/63-42/36 40/63-42/54 40/63-42/90