Add 40/42 and 54/9
1st number: 40/42, 2nd number: 6 0/9
40/42 + 54/9 is 146/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
54/9 = 54 × 14/9 × 14 = 756/126 - Add the two like fractions:
120/126 + 756/126 = 120 + 756/126 = 876/126 - 876/126 simplified gives 146/21
- So, 40/42 + 54/9 = 146/21
In mixed form: 620/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+54/9 40/84+54/9 40/42+54/18 40/42+54/27 40/42+54/45 40/42+54/63