Subtract 21/27 from 63/45
1st number: 1 18/45, 2nd number: 21/27
63/45 - 21/27 is 28/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 45 × 3 = 135,
63/45 = 63 × 3/45 × 3 = 189/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Subtract the two like fractions:
189/135 - 105/135 = 189 - 105/135 = 84/135 - After reducing the fraction, the answer is 28/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/45-42/27 63/90-21/27 63/45-21/54 63/45-63/27 63/45-21/81