Add 2/5 and 42/20
1st number: 2/5, 2nd number: 2 2/20
2/5 + 42/20 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
2/5 = 2 × 4/5 × 4 = 8/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Add the two like fractions:
8/20 + 42/20 = 8 + 42/20 = 50/20 - 50/20 simplified gives 5/2
- So, 2/5 + 42/20 = 5/2
In mixed form: 21/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5+42/20 2/5+84/20 2/10+42/20 2/5+42/40 6/5+42/20 2/15+42/20 2/5+42/60 10/5+42/20 2/25+42/20 14/5+42/20 2/35+42/20