Add 21/35 and 27/63
21/35 + 27/63 is 36/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
27/63 = 27 × 5/63 × 5 = 135/315 - Add the two like fractions:
189/315 + 135/315 = 189 + 135/315 = 324/315 - 324/315 simplified gives 36/35
- So, 21/35 + 27/63 = 36/35
In mixed form: 11/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35+27/63 21/35+54/63 21/70+27/63 63/35+27/63 21/35+81/63