Add 36/20 and 40/81
1st number: 1 16/20, 2nd number: 40/81
36/20 + 40/81 is 929/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
36/20 = 36 × 81/20 × 81 = 2916/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
40/81 = 40 × 20/81 × 20 = 800/1620 - Add the two like fractions:
2916/1620 + 800/1620 = 2916 + 800/1620 = 3716/1620 - 3716/1620 simplified gives 929/405
- So, 36/20 + 40/81 = 929/405
In mixed form: 2119/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+40/81 36/20+80/81 36/40+40/81 36/60+40/81