Add 28/84 and 40/63
28/84 + 40/63 is 61/63.
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,
28/84 = 28 × 3/84 × 3 = 84/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
40/63 = 40 × 4/63 × 4 = 160/252 - Add the two like fractions:
84/252 + 160/252 = 84 + 160/252 = 244/252 - 244/252 simplified gives 61/63
- So, 28/84 + 40/63 = 61/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+40/63 28/84+80/63