Add 40/42 and 54/60
40/42 + 54/60 is 389/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
40/42 = 40 × 10/42 × 10 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Add the two like fractions:
400/420 + 378/420 = 400 + 378/420 = 778/420 - 778/420 simplified gives 389/210
- So, 40/42 + 54/60 = 389/210
In mixed form: 1179/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+54/60 40/84+54/60