Add 3/80 and 1/90
3/80 + 1/90 is 7/144.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
1/90 = 1 × 8/90 × 8 = 8/720 - Add the two like fractions:
27/720 + 8/720 = 27 + 8/720 = 35/720 - 35/720 simplified gives 7/144
- So, 3/80 + 1/90 = 7/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80+1/90 3/80+2/90 9/80+1/90 3/80+3/90 15/80+1/90 3/80+5/90 21/80+1/90 3/80+7/90