Add 72/4 and 28/90
1st number: 18 0/4, 2nd number: 28/90
72/4 + 28/90 is 824/45.
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,
72/4 = 72 × 45/4 × 45 = 3240/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
28/90 = 28 × 2/90 × 2 = 56/180 - Add the two like fractions:
3240/180 + 56/180 = 3240 + 56/180 = 3296/180 - 3296/180 simplified gives 824/45
- So, 72/4 + 28/90 = 824/45
In mixed form: 1814/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/4+56/90 72/8+28/90 72/4+84/90 72/12+28/90 72/20+28/90 72/28+28/90