Add 3/40 and 12/81
3/40 + 12/81 is 241/1080.
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,
3/40 = 3 × 81/40 × 81 = 243/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
12/81 = 12 × 40/81 × 40 = 480/3240 - Add the two like fractions:
243/3240 + 480/3240 = 243 + 480/3240 = 723/3240 - 723/3240 simplified gives 241/1080
- So, 3/40 + 12/81 = 241/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/40+12/81 3/40+24/81 3/80+12/81 9/40+12/81 3/40+36/81 15/40+12/81 3/40+60/81 21/40+12/81 3/40+84/81