Subtract 63/18 from 42/5
1st number: 8 2/5, 2nd number: 3 9/18
42/5 - 63/18 is 49/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
42/5 = 42 × 18/5 × 18 = 756/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
63/18 = 63 × 5/18 × 5 = 315/90 - Subtract the two like fractions:
756/90 - 315/90 = 756 - 315/90 = 441/90 - After reducing the fraction, the answer is 49/10
- In mixed form: 49/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-63/18 42/10-63/18 42/5-63/36 42/15-63/18 42/5-63/54 42/25-63/18 42/5-63/90 42/35-63/18