Subtract 27/8 from 45/63, Solve 45/63

Subtract 27/8 from 45/63

1^st number: 45/63, 2^nd number: 3 3/8

45/63 - 27/8 is -149/56.

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,
45/63 = 45 × 8/63 × 8 = 360/504
Likewise, for the 2nd fraction, since 8 × 63 = 504,
27/8 = 27 × 63/8 × 63 = 1701/504
Subtract the two like fractions:
360/504 - 1701/504 = 360 - 1701/504 = -1341/504
After reducing the fraction, the answer is -149/56

MathStep (Works offline)

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