Add 1/90 and 20/80
1/90 + 20/80 is 47/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
1/90 = 1 × 8/90 × 8 = 8/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720 - Add the two like fractions:
8/720 + 180/720 = 8 + 180/720 = 188/720 - 188/720 simplified gives 47/180
- So, 1/90 + 20/80 = 47/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90+20/80 1/90+40/80 3/90+20/80 1/90+60/80 5/90+20/80 7/90+20/80