Add 21/63 and 2/18
21/63 + 2/18 is 4/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
21/63 = 21 × 2/63 × 2 = 42/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
2/18 = 2 × 7/18 × 7 = 14/126 - Add the two like fractions:
42/126 + 14/126 = 42 + 14/126 = 56/126 - 56/126 simplified gives 4/9
- So, 21/63 + 2/18 = 4/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+2/18 21/63+4/18 21/63+2/36 21/63+6/18 21/63+2/54 21/63+10/18 21/63+2/90 21/63+14/18