Add 63/84 and 40/90
63/84 + 40/90 is 43/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
63/84 = 63 × 15/84 × 15 = 945/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
40/90 = 40 × 14/90 × 14 = 560/1260 - Add the two like fractions:
945/1260 + 560/1260 = 945 + 560/1260 = 1505/1260 - 1505/1260 simplified gives 43/36
- So, 63/84 + 40/90 = 43/36
In mixed form: 17/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/84+80/90