Add 54/63 and 21/35
54/63 + 21/35 is 51/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
54/63 = 54 × 5/63 × 5 = 270/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315 - Add the two like fractions:
270/315 + 189/315 = 270 + 189/315 = 459/315 - 459/315 simplified gives 51/35
- So, 54/63 + 21/35 = 51/35
In mixed form: 116/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+42/35 54/63+21/70 54/63+63/35