Add 12/7 and 42/45
1st number: 1 5/7, 2nd number: 42/45
12/7 + 42/45 is 278/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
12/7 = 12 × 45/7 × 45 = 540/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
42/45 = 42 × 7/45 × 7 = 294/315 - Add the two like fractions:
540/315 + 294/315 = 540 + 294/315 = 834/315 - 834/315 simplified gives 278/105
- So, 12/7 + 42/45 = 278/105
In mixed form: 268/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7+42/45 12/7+84/45 12/14+42/45 12/7+42/90 36/7+42/45 12/21+42/45 60/7+42/45 12/35+42/45 84/7+42/45 12/49+42/45