Subtract 21/63 from 40/8, Solve 5 0/8

Subtract 21/63 from 40/8

1^st number: 5 0/8, 2^nd number: 21/63

40/8 - 21/63 is 14/3.

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,
40/8 = 40 × 63/8 × 63 = 2520/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
21/63 = 21 × 8/63 × 8 = 168/504
Subtract the two like fractions:
2520/504 - 168/504 = 2520 - 168/504 = 2352/504
After reducing the fraction, the answer is 14/3
In mixed form: 42/3

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad