Subtract 8/90 from 90/20
1st number: 4 10/20, 2nd number: 8/90
90/20 - 8/90 is 397/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
8/90 = 8 × 2/90 × 2 = 16/180 - Subtract the two like fractions:
810/180 - 16/180 = 810 - 16/180 = 794/180 - After reducing the fraction, the answer is 397/90
- In mixed form: 437/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-16/90 90/40-8/90 90/20-24/90 90/60-8/90 90/20-40/90 90/20-56/90