Add 72/80 and 35/18
1st number: 72/80, 2nd number: 1 17/18
72/80 + 35/18 is 128/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
35/18 = 35 × 40/18 × 40 = 1400/720 - Add the two like fractions:
648/720 + 1400/720 = 648 + 1400/720 = 2048/720 - 2048/720 simplified gives 128/45
- So, 72/80 + 35/18 = 128/45
In mixed form: 238/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+70/18 72/80+35/36 72/80+35/54 72/80+35/90