Add 90/5 and 80/90
1st number: 18 0/5, 2nd number: 80/90
90/5 + 80/90 is 170/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
90/5 = 90 × 18/5 × 18 = 1620/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
80/90 = 80 × 1/90 × 1 = 80/90 - Add the two like fractions:
1620/90 + 80/90 = 1620 + 80/90 = 1700/90 - 1700/90 simplified gives 170/9
- So, 90/5 + 80/90 = 170/9
In mixed form: 188/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10+80/90 90/15+80/90 90/25+80/90 90/35+80/90