Add 84/63 and 2/7
1st number: 1 21/63, 2nd number: 2/7
84/63 + 2/7 is 34/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
84/63 = 84 × 1/63 × 1 = 84/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
2/7 = 2 × 9/7 × 9 = 18/63 - Add the two like fractions:
84/63 + 18/63 = 84 + 18/63 = 102/63 - 102/63 simplified gives 34/21
- So, 84/63 + 2/7 = 34/21
In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63+4/7 84/63+2/14 84/63+6/7 84/63+2/21 84/63+10/7 84/63+2/35 84/63+14/7 84/63+2/49