Subtract 90/10 from 20/5
1st number: 4 0/5, 2nd number: 9 0/10
20/5 - 90/10 is -5/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 5 × 2 = 10,
20/5 = 20 × 2/5 × 2 = 40/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
90/10 = 90 × 1/10 × 1 = 90/10 - Subtract the two like fractions:
40/10 - 90/10 = 40 - 90/10 = -50/10 - After reducing the fraction, the answer is -5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-90/10 20/10-90/10 20/5-90/20 60/5-90/10 20/15-90/10 20/5-90/30 20/25-90/10 20/5-90/50 20/35-90/10 20/5-90/70