Subtract 18/8 from 40/63
1st number: 40/63, 2nd number: 2 2/8
40/63 - 18/8 is -407/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
40/63 = 40 × 8/63 × 8 = 320/504 - Likewise, for the 2nd fraction, since 8 × 63 = 504,
18/8 = 18 × 63/8 × 63 = 1134/504 - Subtract the two like fractions:
320/504 - 1134/504 = 320 - 1134/504 = -814/504 - After reducing the fraction, the answer is -407/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63-18/8 40/63-36/8 40/63-18/16 40/63-54/8 40/63-18/24 40/63-90/8 40/63-18/40 40/63-18/56