Add 30/63 and 8/21
30/63 + 8/21 is 6/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
30/63 = 30 × 1/63 × 1 = 30/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
8/21 = 8 × 3/21 × 3 = 24/63 - Add the two like fractions:
30/63 + 24/63 = 30 + 24/63 = 54/63 - 54/63 simplified gives 6/7
- So, 30/63 + 8/21 = 6/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63+8/21 30/63+16/21 30/63+8/42 90/63+8/21 30/63+24/21 30/63+8/63 30/63+40/21 30/63+56/21