Subtract 2/45 from 3/20
3/20 - 2/45 is 19/180.
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,
3/20 = 3 × 9/20 × 9 = 27/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
2/45 = 2 × 4/45 × 4 = 8/180 - Subtract the two like fractions:
27/180 - 8/180 = 27 - 8/180 = 19/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-2/45 3/20-4/45 3/40-2/45 3/20-2/90 9/20-2/45 3/20-6/45 3/60-2/45 15/20-2/45 3/20-10/45 21/20-2/45 3/20-14/45