Add 45/42 and 12/8
1st number: 1 3/42, 2nd number: 1 4/8
45/42 + 12/8 is 18/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
45/42 = 45 × 4/42 × 4 = 180/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
12/8 = 12 × 21/8 × 21 = 252/168 - Add the two like fractions:
180/168 + 252/168 = 180 + 252/168 = 432/168 - 432/168 simplified gives 18/7
- So, 45/42 + 12/8 = 18/7
In mixed form: 24/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+12/8 45/42+24/8 45/84+12/8 45/42+12/16 45/42+36/8 45/42+12/24 45/42+60/8 45/42+12/40 45/42+84/8 45/42+12/56