Add 42/12 and 54/40
1st number: 3 6/12, 2nd number: 1 14/40
42/12 + 54/40 is 97/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 12 × 10 = 120,
42/12 = 42 × 10/12 × 10 = 420/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
54/40 = 54 × 3/40 × 3 = 162/120 - Add the two like fractions:
420/120 + 162/120 = 420 + 162/120 = 582/120 - 582/120 simplified gives 97/20
- So, 42/12 + 54/40 = 97/20
In mixed form: 417/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+54/40 42/24+54/40 42/12+54/80 42/36+54/40 42/60+54/40 42/84+54/40