Add 64/28 and 84/90
1st number: 2 8/28, 2nd number: 84/90
64/28 + 84/90 is 338/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
64/28 = 64 × 45/28 × 45 = 2880/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
84/90 = 84 × 14/90 × 14 = 1176/1260 - Add the two like fractions:
2880/1260 + 1176/1260 = 2880 + 1176/1260 = 4056/1260 - 4056/1260 simplified gives 338/105
- So, 64/28 + 84/90 = 338/105
In mixed form: 323/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/56+84/90 64/84+84/90