Add 30/81 and 3/40
30/81 + 3/40 is 481/1080.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
30/81 = 30 × 40/81 × 40 = 1200/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
3/40 = 3 × 81/40 × 81 = 243/3240 - Add the two like fractions:
1200/3240 + 243/3240 = 1200 + 243/3240 = 1443/3240 - 1443/3240 simplified gives 481/1080
- So, 30/81 + 3/40 = 481/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/81+3/40 30/81+6/40 30/81+3/80 90/81+3/40 30/81+9/40 30/81+15/40 30/81+21/40