Add 45/12 and 8/42
1st number: 3 9/12, 2nd number: 8/42
45/12 + 8/42 is 331/84.
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,
8/42 = 8 × 2/42 × 2 = 16/84 - Add the two like fractions:
315/84 + 16/84 = 315 + 16/84 = 331/84 - So, 45/12 + 8/42 = 331/84
In mixed form: 379/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+8/42 45/12+16/42 45/24+8/42 45/12+8/84 45/12+24/42 45/36+8/42 45/12+40/42 45/60+8/42 45/12+56/42 45/84+8/42