Add 90/15 and 81/4
1st number: 6 0/15, 2nd number: 20 1/4
90/15 + 81/4 is 105/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
81/4 = 81 × 15/4 × 15 = 1215/60 - Add the two like fractions:
360/60 + 1215/60 = 360 + 1215/60 = 1575/60 - 1575/60 simplified gives 105/4
- So, 90/15 + 81/4 = 105/4
In mixed form: 261/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+81/4 90/15+81/8 90/45+81/4 90/15+81/12 90/75+81/4 90/15+81/20 90/15+81/28