Subtract 54/63 from 90/5
1st number: 18 0/5, 2nd number: 54/63
90/5 - 54/63 is 120/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 5 × 63 = 315,
90/5 = 90 × 63/5 × 63 = 5670/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
54/63 = 54 × 5/63 × 5 = 270/315 - Subtract the two like fractions:
5670/315 - 270/315 = 5670 - 270/315 = 5400/315 - After reducing the fraction, the answer is 120/7
- In mixed form: 171/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10-54/63 90/15-54/63 90/25-54/63 90/35-54/63