Add 45/12 and 12/42
1st number: 3 9/12, 2nd number: 12/42
45/12 + 12/42 is 113/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
12/42 = 12 × 2/42 × 2 = 24/84 - Add the two like fractions:
315/84 + 24/84 = 315 + 24/84 = 339/84 - 339/84 simplified gives 113/28
- So, 45/12 + 12/42 = 113/28
In mixed form: 41/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+12/42 45/12+24/42 45/24+12/42 45/12+12/84 45/12+36/42 45/36+12/42 45/12+60/42 45/60+12/42 45/12+84/42 45/84+12/42