Add 90/80 and 3/45
1st number: 1 10/80, 2nd number: 3/45
90/80 + 3/45 is 143/120.
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,
3/45 = 3 × 16/45 × 16 = 48/720 - Add the two like fractions:
810/720 + 48/720 = 810 + 48/720 = 858/720 - 858/720 simplified gives 143/120
- So, 90/80 + 3/45 = 143/120
In mixed form: 123/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+6/45 90/80+3/90 90/80+9/45 90/80+15/45 90/80+21/45