Add 18/63 and 3/9
18/63 + 3/9 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
18/63 = 18 × 1/63 × 1 = 18/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
3/9 = 3 × 7/9 × 7 = 21/63 - Add the two like fractions:
18/63 + 21/63 = 18 + 21/63 = 39/63 - 39/63 simplified gives 13/21
- So, 18/63 + 3/9 = 13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/63+3/9 18/63+6/9 18/63+3/18 54/63+3/9 18/63+3/27 90/63+3/9 18/63+15/9 18/63+3/45 18/63+21/9 18/63+3/63