Add 20/42 and 2/5
20/42 + 2/5 is 92/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 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 5 × 42 = 210,
2/5 = 2 × 42/5 × 42 = 84/210 - Add the two like fractions:
100/210 + 84/210 = 100 + 84/210 = 184/210 - 184/210 simplified gives 92/105
- So, 20/42 + 2/5 = 92/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+2/5 20/42+4/5 20/84+2/5 20/42+2/10 60/42+2/5 20/42+6/5 20/42+2/15 20/42+10/5 20/42+2/25 20/42+14/5 20/42+2/35