Add 84/18 and 40/90
1st number: 4 12/18, 2nd number: 40/90
84/18 + 40/90 is 46/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
84/18 = 84 × 5/18 × 5 = 420/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
40/90 = 40 × 1/90 × 1 = 40/90 - Add the two like fractions:
420/90 + 40/90 = 420 + 40/90 = 460/90 - 460/90 simplified gives 46/9
- So, 84/18 + 40/90 = 46/9
In mixed form: 51/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+80/90 84/36+40/90 84/54+40/90 84/90+40/90