Add 20/5 and 42/84
1st number: 4 0/5, 2nd number: 42/84
20/5 + 42/84 is 9/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
20/5 = 20 × 84/5 × 84 = 1680/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
42/84 = 42 × 5/84 × 5 = 210/420 - Add the two like fractions:
1680/420 + 210/420 = 1680 + 210/420 = 1890/420 - 1890/420 simplified gives 9/2
- So, 20/5 + 42/84 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+42/84 20/10+42/84 60/5+42/84 20/15+42/84 20/25+42/84 20/35+42/84