Add 1/5 and 80/90
1/5 + 80/90 is 49/45.
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,
1/5 = 1 × 18/5 × 18 = 18/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
80/90 = 80 × 1/90 × 1 = 80/90 - Add the two like fractions:
18/90 + 80/90 = 18 + 80/90 = 98/90 - 98/90 simplified gives 49/45
- So, 1/5 + 80/90 = 49/45
In mixed form: 14/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/5+80/90 1/10+80/90 3/5+80/90 1/15+80/90 1/25+80/90 7/5+80/90 1/35+80/90