Add 12/5 and 18/42
1st number: 2 2/5, 2nd number: 18/42
12/5 + 18/42 is 99/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
12/5 = 12 × 42/5 × 42 = 504/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Add the two like fractions:
504/210 + 90/210 = 504 + 90/210 = 594/210 - 594/210 simplified gives 99/35
- So, 12/5 + 18/42 = 99/35
In mixed form: 229/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5+18/42 12/5+36/42 12/10+18/42 12/5+18/84 36/5+18/42 12/5+54/42 12/15+18/42 60/5+18/42 12/5+90/42 12/25+18/42 84/5+18/42 12/35+18/42