Add 54/81 and 18/40
54/81 + 18/40 is 67/60.
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,
54/81 = 54 × 40/81 × 40 = 2160/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
18/40 = 18 × 81/40 × 81 = 1458/3240 - Add the two like fractions:
2160/3240 + 1458/3240 = 2160 + 1458/3240 = 3618/3240 - 3618/3240 simplified gives 67/60
- So, 54/81 + 18/40 = 67/60
In mixed form: 17/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/81+36/40 54/81+18/80 54/81+54/40 54/81+90/40