Add 10/42 and 30/20
1st number: 10/42, 2nd number: 1 10/20
10/42 + 30/20 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
10/42 = 10 × 10/42 × 10 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
30/20 = 30 × 21/20 × 21 = 630/420 - Add the two like fractions:
100/420 + 630/420 = 100 + 630/420 = 730/420 - 730/420 simplified gives 73/42
- So, 10/42 + 30/20 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+30/20 10/42+60/20 10/84+30/20 10/42+30/40 30/42+30/20 10/42+90/20 10/42+30/60 50/42+30/20 70/42+30/20