Add 40/54 and 12/81
40/54 + 12/81 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
40/54 = 40 × 3/54 × 3 = 120/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
12/81 = 12 × 2/81 × 2 = 24/162 - Add the two like fractions:
120/162 + 24/162 = 120 + 24/162 = 144/162 - 144/162 simplified gives 8/9
- So, 40/54 + 12/81 = 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/54+12/81 40/54+24/81 40/54+36/81 40/54+60/81 40/54+84/81