Add 54/60 and 9/42
54/60 + 9/42 is 39/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
9/42 = 9 × 10/42 × 10 = 90/420 - Add the two like fractions:
378/420 + 90/420 = 378 + 90/420 = 468/420 - 468/420 simplified gives 39/35
- So, 54/60 + 9/42 = 39/35
In mixed form: 14/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/60+18/42 54/60+9/84 54/60+27/42 54/60+45/42 54/60+63/42