Add 90/80 and 80/45
1st number: 1 10/80, 2nd number: 1 35/45
90/80 + 80/45 is 209/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
80/45 = 80 × 16/45 × 16 = 1280/720 - Add the two like fractions:
810/720 + 1280/720 = 810 + 1280/720 = 2090/720 - 2090/720 simplified gives 209/72
- So, 90/80 + 80/45 = 209/72
In mixed form: 265/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+80/90