Add 8/84 and 45/63
8/84 + 45/63 is 17/21.
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,
8/84 = 8 × 3/84 × 3 = 24/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
45/63 = 45 × 4/63 × 4 = 180/252 - Add the two like fractions:
24/252 + 180/252 = 24 + 180/252 = 204/252 - 204/252 simplified gives 17/21
- So, 8/84 + 45/63 = 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84+45/63 8/84+90/63 24/84+45/63 40/84+45/63 56/84+45/63