Subtract 2/90 from 3/20
3/20 - 2/90 is 23/180.
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,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
2/90 = 2 × 2/90 × 2 = 4/180 - Subtract the two like fractions:
27/180 - 4/180 = 27 - 4/180 = 23/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-2/90 3/20-4/90 3/40-2/90 9/20-2/90 3/20-6/90 3/60-2/90 15/20-2/90 3/20-10/90 21/20-2/90 3/20-14/90