Add 84/4 and 7/90
1st number: 21 0/4, 2nd number: 7/90
84/4 + 7/90 is 1897/90.
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,
84/4 = 84 × 45/4 × 45 = 3780/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Add the two like fractions:
3780/180 + 14/180 = 3780 + 14/180 = 3794/180 - 3794/180 simplified gives 1897/90
- So, 84/4 + 7/90 = 1897/90
In mixed form: 217/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4+14/90 84/8+7/90 84/4+21/90 84/12+7/90 84/4+35/90 84/20+7/90 84/4+49/90 84/28+7/90