Add 40/81 and 54/20
1st number: 40/81, 2nd number: 2 14/20
40/81 + 54/20 is 2587/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
40/81 = 40 × 20/81 × 20 = 800/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
54/20 = 54 × 81/20 × 81 = 4374/1620 - Add the two like fractions:
800/1620 + 4374/1620 = 800 + 4374/1620 = 5174/1620 - 5174/1620 simplified gives 2587/810
- So, 40/81 + 54/20 = 2587/810
In mixed form: 3157/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/81+54/20 40/81+54/40 40/81+54/60