Add 81/4 and 5/90
1st number: 20 1/4, 2nd number: 5/90
81/4 + 5/90 is 731/36.
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,
81/4 = 81 × 45/4 × 45 = 3645/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
5/90 = 5 × 2/90 × 2 = 10/180 - Add the two like fractions:
3645/180 + 10/180 = 3645 + 10/180 = 3655/180 - 3655/180 simplified gives 731/36
- So, 81/4 + 5/90 = 731/36
In mixed form: 2011/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+10/90 81/8+5/90 81/4+15/90 81/12+5/90 81/4+25/90 81/20+5/90 81/4+35/90 81/28+5/90