Subtract 2/45 from 12/20
12/20 - 2/45 is 5/9.
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,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
2/45 = 2 × 4/45 × 4 = 8/180 - Subtract the two like fractions:
108/180 - 8/180 = 108 - 8/180 = 100/180 - After reducing the fraction, the answer is 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-2/45 12/20-4/45 12/40-2/45 12/20-2/90 36/20-2/45 12/20-6/45 12/60-2/45 60/20-2/45 12/20-10/45 84/20-2/45 12/20-14/45