Subtract 10/5 from 90/20
1st number: 4 10/20, 2nd number: 2 0/5
90/20 - 10/5 is 5/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
90/20 = 90 × 1/20 × 1 = 90/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
10/5 = 10 × 4/5 × 4 = 40/20 - Subtract the two like fractions:
90/20 - 40/20 = 90 - 40/20 = 50/20 - After reducing the fraction, the answer is 5/2
- In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-20/5 90/40-10/5 90/20-30/5 90/60-10/5 90/20-10/15 90/20-50/5 90/20-10/25 90/20-70/5 90/20-10/35