Add 4/84 and 40/30
1st number: 4/84, 2nd number: 1 10/30
4/84 + 40/30 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 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 30 × 14 = 420,
40/30 = 40 × 14/30 × 14 = 560/420 - Add the two like fractions:
20/420 + 560/420 = 20 + 560/420 = 580/420 - 580/420 simplified gives 29/21
- So, 4/84 + 40/30 = 29/21
In mixed form: 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84+40/30 4/84+80/30 4/84+40/60 12/84+40/30 4/84+40/90 20/84+40/30 28/84+40/30