Add 1/12 and 42/40
1st number: 1/12, 2nd number: 1 2/40
1/12 + 42/40 is 17/15.
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,
1/12 = 1 × 10/12 × 10 = 10/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
42/40 = 42 × 3/40 × 3 = 126/120 - Add the two like fractions:
10/120 + 126/120 = 10 + 126/120 = 136/120 - 136/120 simplified gives 17/15
- So, 1/12 + 42/40 = 17/15
In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/12+42/40 1/12+84/40 1/24+42/40 1/12+42/80 3/12+42/40 1/36+42/40 5/12+42/40 1/60+42/40 7/12+42/40 1/84+42/40