Subtract 20/9 from 63/45
1st number: 1 18/45, 2nd number: 2 2/9
63/45 - 20/9 is -37/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
63/45 = 63 × 1/45 × 1 = 63/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
20/9 = 20 × 5/9 × 5 = 100/45 - Subtract the two like fractions:
63/45 - 100/45 = 63 - 100/45 = -37/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/45-40/9 63/90-20/9 63/45-20/18 63/45-60/9 63/45-20/27 63/45-20/45 63/45-20/63