Add 20/42 and 6/30
20/42 + 6/30 is 71/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 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 30 × 7 = 210,
6/30 = 6 × 7/30 × 7 = 42/210 - Add the two like fractions:
100/210 + 42/210 = 100 + 42/210 = 142/210 - 142/210 simplified gives 71/105
- So, 20/42 + 6/30 = 71/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+6/30 20/42+12/30 20/84+6/30 20/42+6/60 60/42+6/30 20/42+18/30 20/42+6/90 20/42+42/30