Add 9/42 and 54/84
9/42 + 54/84 is 6/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
9/42 = 9 × 2/42 × 2 = 18/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
54/84 = 54 × 1/84 × 1 = 54/84 - Add the two like fractions:
18/84 + 54/84 = 18 + 54/84 = 72/84 - 72/84 simplified gives 6/7
- So, 9/42 + 54/84 = 6/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+54/84 9/84+54/84 27/42+54/84 45/42+54/84 63/42+54/84