Add 80/81 and 54/40
1st number: 80/81, 2nd number: 1 14/40
80/81 + 54/40 is 3787/1620.
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,
80/81 = 80 × 40/81 × 40 = 3200/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
54/40 = 54 × 81/40 × 81 = 4374/3240 - Add the two like fractions:
3200/3240 + 4374/3240 = 3200 + 4374/3240 = 7574/3240 - 7574/3240 simplified gives 3787/1620
- So, 80/81 + 54/40 = 3787/1620
In mixed form: 2547/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/81+54/80