Subtract 4/90 from 20/10
1st number: 2 0/10, 2nd number: 4/90
20/10 - 4/90 is 88/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
20/10 = 20 × 9/10 × 9 = 180/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
4/90 = 4 × 1/90 × 1 = 4/90 - Subtract the two like fractions:
180/90 - 4/90 = 180 - 4/90 = 176/90 - After reducing the fraction, the answer is 88/45
- In mixed form: 143/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10-4/90 20/10-8/90 60/10-4/90 20/10-12/90 20/30-4/90 20/10-20/90 20/50-4/90 20/10-28/90 20/70-4/90