Add 72/80 and 5/8
72/80 + 5/8 is 61/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 8 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 8 × 10 = 80,
5/8 = 5 × 10/8 × 10 = 50/80 - Add the two like fractions:
72/80 + 50/80 = 72 + 50/80 = 122/80 - 122/80 simplified gives 61/40
- So, 72/80 + 5/8 = 61/40
In mixed form: 121/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+10/8 72/80+5/16 72/80+15/8 72/80+5/24 72/80+25/8 72/80+5/40 72/80+35/8 72/80+5/56