Add 4/84 and 80/30
1st number: 4/84, 2nd number: 2 20/30
4/84 + 80/30 is 19/7.
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,
80/30 = 80 × 14/30 × 14 = 1120/420 - Add the two like fractions:
20/420 + 1120/420 = 20 + 1120/420 = 1140/420 - 1140/420 simplified gives 19/7
- So, 4/84 + 80/30 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/84+80/30 4/84+80/60 12/84+80/30 4/84+80/90 20/84+80/30 28/84+80/30