Add 72/90 and 84/5
1st number: 72/90, 2nd number: 16 4/5
72/90 + 84/5 is 88/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
72/90 = 72 × 1/90 × 1 = 72/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
84/5 = 84 × 18/5 × 18 = 1512/90 - Add the two like fractions:
72/90 + 1512/90 = 72 + 1512/90 = 1584/90 - 1584/90 simplified gives 88/5
- So, 72/90 + 84/5 = 88/5
In mixed form: 173/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+84/10 72/90+84/15 72/90+84/25 72/90+84/35