Add 1/84 and 21/63
1/84 + 21/63 is 29/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
1/84 = 1 × 3/84 × 3 = 3/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
21/63 = 21 × 4/63 × 4 = 84/252 - Add the two like fractions:
3/252 + 84/252 = 3 + 84/252 = 87/252 - 87/252 simplified gives 29/84
- So, 1/84 + 21/63 = 29/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84+21/63 1/84+42/63 3/84+21/63 5/84+21/63 7/84+21/63