Subtract 40/63 from 7/8
7/8 - 40/63 is 121/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 8 × 63 = 504,
7/8 = 7 × 63/8 × 63 = 441/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
40/63 = 40 × 8/63 × 8 = 320/504 - Subtract the two like fractions:
441/504 - 320/504 = 441 - 320/504 = 121/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/8-40/63 7/8-80/63 7/16-40/63 21/8-40/63 7/24-40/63 35/8-40/63 7/40-40/63 49/8-40/63 7/56-40/63