Add 35/20 and 42/84
1st number: 1 15/20, 2nd number: 42/84
35/20 + 42/84 is 9/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
35/20 = 35 × 21/20 × 21 = 735/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
42/84 = 42 × 5/84 × 5 = 210/420 - Add the two like fractions:
735/420 + 210/420 = 735 + 210/420 = 945/420 - 945/420 simplified gives 9/4
- So, 35/20 + 42/84 = 9/4
In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+42/84 35/40+42/84 35/60+42/84