Subtract 27/63 from 63/42
1st number: 1 21/42, 2nd number: 27/63
63/42 - 27/63 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
63/42 = 63 × 3/42 × 3 = 189/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
27/63 = 27 × 2/63 × 2 = 54/126 - Subtract the two like fractions:
189/126 - 54/126 = 189 - 54/126 = 135/126 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-54/63 63/84-27/63 63/42-81/63