Add 72/40 and 35/81
1st number: 1 32/40, 2nd number: 35/81
72/40 + 35/81 is 904/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
72/40 = 72 × 81/40 × 81 = 5832/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
35/81 = 35 × 40/81 × 40 = 1400/3240 - Add the two like fractions:
5832/3240 + 1400/3240 = 5832 + 1400/3240 = 7232/3240 - 7232/3240 simplified gives 904/405
- So, 72/40 + 35/81 = 904/405
In mixed form: 294/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+70/81 72/80+35/81