Add 15/40 and 16/81
15/40 + 16/81 is 371/648.
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,
15/40 = 15 × 81/40 × 81 = 1215/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
16/81 = 16 × 40/81 × 40 = 640/3240 - Add the two like fractions:
1215/3240 + 640/3240 = 1215 + 640/3240 = 1855/3240 - 1855/3240 simplified gives 371/648
- So, 15/40 + 16/81 = 371/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+16/81 15/40+32/81 15/80+16/81 45/40+16/81 15/40+48/81 75/40+16/81 15/40+80/81