Add 9/21 and 8/63
9/21 + 8/63 is 5/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
9/21 = 9 × 3/21 × 3 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
8/63 = 8 × 1/63 × 1 = 8/63 - Add the two like fractions:
27/63 + 8/63 = 27 + 8/63 = 35/63 - 35/63 simplified gives 5/9
- So, 9/21 + 8/63 = 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+8/63 9/21+16/63 9/42+8/63 27/21+8/63 9/21+24/63 9/63+8/63 45/21+8/63 9/21+40/63 63/21+8/63 9/21+56/63