Subtract 2/30 from 20/90
20/90 - 2/30 is 7/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
2/30 = 2 × 3/30 × 3 = 6/90 - Subtract the two like fractions:
20/90 - 6/90 = 20 - 6/90 = 14/90 - After reducing the fraction, the answer is 7/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-2/30 20/90-4/30 20/90-2/60 60/90-2/30 20/90-6/30 20/90-2/90 20/90-10/30 20/90-14/30