Add 54/63 and 27/42
54/63 + 27/42 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
54/63 = 54 × 2/63 × 2 = 108/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
27/42 = 27 × 3/42 × 3 = 81/126 - Add the two like fractions:
108/126 + 81/126 = 108 + 81/126 = 189/126 - 189/126 simplified gives 3/2
- So, 54/63 + 27/42 = 3/2
In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+54/42 54/63+27/84 54/63+81/42