Add 72/40 and 90/80
1st number: 1 32/40, 2nd number: 1 10/80
72/40 + 90/80 is 117/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
72/40 = 72 × 2/40 × 2 = 144/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
90/80 = 90 × 1/80 × 1 = 90/80 - Add the two like fractions:
144/80 + 90/80 = 144 + 90/80 = 234/80 - 234/80 simplified gives 117/40
- So, 72/40 + 90/80 = 117/40
In mixed form: 237/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+90/80