Add 90/80 and 36/45
1st number: 1 10/80, 2nd number: 36/45
90/80 + 36/45 is 77/40.
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,
36/45 = 36 × 16/45 × 16 = 576/720 - Add the two like fractions:
810/720 + 576/720 = 810 + 576/720 = 1386/720 - 1386/720 simplified gives 77/40
- So, 90/80 + 36/45 = 77/40
In mixed form: 137/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+72/45 90/80+36/90