Subtract 6/45 from 90/20
1st number: 4 10/20, 2nd number: 6/45
90/20 - 6/45 is 131/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 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 45 × 4 = 180,
6/45 = 6 × 4/45 × 4 = 24/180 - Subtract the two like fractions:
810/180 - 24/180 = 810 - 24/180 = 786/180 - After reducing the fraction, the answer is 131/30
- In mixed form: 411/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-12/45 90/40-6/45 90/20-6/90 90/20-18/45 90/60-6/45 90/20-30/45 90/20-42/45