Add 72/80 and 35/40
72/80 + 35/40 is 71/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
72/80 = 72 × 1/80 × 1 = 72/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
35/40 = 35 × 2/40 × 2 = 70/80 - Add the two like fractions:
72/80 + 70/80 = 72 + 70/80 = 142/80 - 142/80 simplified gives 71/40
- So, 72/80 + 35/40 = 71/40
In mixed form: 131/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+70/40 72/80+35/80