Add 42/84 and 12/35
42/84 + 12/35 is 59/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
42/84 = 42 × 5/84 × 5 = 210/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
12/35 = 12 × 12/35 × 12 = 144/420 - Add the two like fractions:
210/420 + 144/420 = 210 + 144/420 = 354/420 - 354/420 simplified gives 59/70
- So, 42/84 + 12/35 = 59/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+24/35 42/84+12/70 42/84+36/35 42/84+60/35 42/84+84/35