Subtract 50/45 from 63/84, Solve 63/84

Subtract 50/45 from 63/84

1^st number: 63/84, 2^nd number: 1 5/45

63/84 - 50/45 is -13/36.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 84 × 15 = 1260,
63/84 = 63 × 15/84 × 15 = 945/1260
Likewise, for the 2nd fraction, since 45 × 28 = 1260,
50/45 = 50 × 28/45 × 28 = 1400/1260
Subtract the two like fractions:
945/1260 - 1400/1260 = 945 - 1400/1260 = -455/1260
After reducing the fraction, the answer is -13/36

MathStep (Works offline)

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