Subtract 12/45 from 15/20
15/20 - 12/45 is 29/60.
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,
15/20 = 15 × 9/20 × 9 = 135/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
12/45 = 12 × 4/45 × 4 = 48/180 - Subtract the two like fractions:
135/180 - 48/180 = 135 - 48/180 = 87/180 - After reducing the fraction, the answer is 29/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20-12/45 15/20-24/45 15/40-12/45 15/20-12/90 45/20-12/45 15/20-36/45 15/60-12/45 75/20-12/45 15/20-60/45 15/20-84/45