Subtract 30/90 from 90/20
1st number: 4 10/20, 2nd number: 30/90
90/20 - 30/90 is 25/6.
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,
30/90 = 30 × 2/90 × 2 = 60/180 - Subtract the two like fractions:
810/180 - 60/180 = 810 - 60/180 = 750/180 - After reducing the fraction, the answer is 25/6
- In mixed form: 41/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-60/90 90/40-30/90 90/60-30/90