Add 28/4 and 9/90
1st number: 7 0/4, 2nd number: 9/90
28/4 + 9/90 is 71/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
28/4 = 28 × 45/4 × 45 = 1260/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
9/90 = 9 × 2/90 × 2 = 18/180 - Add the two like fractions:
1260/180 + 18/180 = 1260 + 18/180 = 1278/180 - 1278/180 simplified gives 71/10
- So, 28/4 + 9/90 = 71/10
In mixed form: 71/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4+9/90 28/4+18/90 28/8+9/90 84/4+9/90 28/4+27/90 28/12+9/90 28/4+45/90 28/20+9/90 28/4+63/90