Add 4/84 and 3/20
4/84 + 3/20 is 83/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
3/20 = 3 × 21/20 × 21 = 63/420 - Add the two like fractions:
20/420 + 63/420 = 20 + 63/420 = 83/420 - So, 4/84 + 3/20 = 83/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84+3/20 4/84+6/20 4/84+3/40 12/84+3/20 4/84+9/20 4/84+3/60 20/84+3/20 4/84+15/20 28/84+3/20 4/84+21/20