Subtract 15/9 from 32/20
1st number: 1 12/20, 2nd number: 1 6/9
32/20 - 15/9 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
32/20 = 32 × 9/20 × 9 = 288/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
15/9 = 15 × 20/9 × 20 = 300/180 - Subtract the two like fractions:
288/180 - 300/180 = 288 - 300/180 = -12/180 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/20-15/9 32/20-30/9 32/40-15/9 32/20-15/18 96/20-15/9 32/20-45/9 32/60-15/9 32/20-15/27 32/20-75/9 32/20-15/45 32/20-15/63