Add 10/42 and 9/54
10/42 + 9/54 is 17/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
10/42 = 10 × 9/42 × 9 = 90/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378 - Add the two like fractions:
90/378 + 63/378 = 90 + 63/378 = 153/378 - 153/378 simplified gives 17/42
- So, 10/42 + 9/54 = 17/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+9/54 10/42+18/54 10/84+9/54 30/42+9/54 10/42+27/54 50/42+9/54 10/42+45/54 70/42+9/54 10/42+63/54