Add 20/42 and 70/35
1st number: 20/42, 2nd number: 2 0/35
20/42 + 70/35 is 52/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
70/35 = 70 × 6/35 × 6 = 420/210 - Add the two like fractions:
100/210 + 420/210 = 100 + 420/210 = 520/210 - 520/210 simplified gives 52/21
- So, 20/42 + 70/35 = 52/21
In mixed form: 210/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+70/35 20/84+70/35 60/42+70/35