Add 49/80 and 72/90
49/80 + 72/90 is 113/80.
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,
49/80 = 49 × 9/80 × 9 = 441/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
72/90 = 72 × 8/90 × 8 = 576/720 - Add the two like fractions:
441/720 + 576/720 = 441 + 576/720 = 1017/720 - 1017/720 simplified gives 113/80
- So, 49/80 + 72/90 = 113/80
In mixed form: 133/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/80+72/90