Add 21/14 and 54/63
1st number: 1 7/14, 2nd number: 54/63
21/14 + 54/63 is 33/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
21/14 = 21 × 9/14 × 9 = 189/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
54/63 = 54 × 2/63 × 2 = 108/126 - Add the two like fractions:
189/126 + 108/126 = 189 + 108/126 = 297/126 - 297/126 simplified gives 33/14
- So, 21/14 + 54/63 = 33/14
In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14+54/63 21/28+54/63 63/14+54/63 21/42+54/63 21/70+54/63 21/98+54/63