Add 84/5 and 42/20
1st number: 16 4/5, 2nd number: 2 2/20
84/5 + 42/20 is 189/10.
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,
84/5 = 84 × 4/5 × 4 = 336/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
42/20 = 42 × 1/20 × 1 = 42/20 - Add the two like fractions:
336/20 + 42/20 = 336 + 42/20 = 378/20 - 378/20 simplified gives 189/10
- So, 84/5 + 42/20 = 189/10
In mixed form: 189/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5+84/20 84/10+42/20 84/5+42/40 84/15+42/20 84/5+42/60 84/25+42/20 84/35+42/20