Add 60/40 and 20/81
1st number: 1 20/40, 2nd number: 20/81
60/40 + 20/81 is 283/162.
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,
60/40 = 60 × 81/40 × 81 = 4860/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
20/81 = 20 × 40/81 × 40 = 800/3240 - Add the two like fractions:
4860/3240 + 800/3240 = 4860 + 800/3240 = 5660/3240 - 5660/3240 simplified gives 283/162
- So, 60/40 + 20/81 = 283/162
In mixed form: 1121/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+40/81 60/80+20/81 60/40+60/81