Subtract 30/63 from 90/20
1st number: 4 10/20, 2nd number: 30/63
90/20 - 30/63 is 169/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
90/20 = 90 × 63/20 × 63 = 5670/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
30/63 = 30 × 20/63 × 20 = 600/1260 - Subtract the two like fractions:
5670/1260 - 600/1260 = 5670 - 600/1260 = 5070/1260 - After reducing the fraction, the answer is 169/42
- In mixed form: 41/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-60/63 90/40-30/63 90/20-90/63 90/60-30/63