Add 84/20 and 72/80
1st number: 4 4/20, 2nd number: 72/80
84/20 + 72/80 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
84/20 = 84 × 4/20 × 4 = 336/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
72/80 = 72 × 1/80 × 1 = 72/80 - Add the two like fractions:
336/80 + 72/80 = 336 + 72/80 = 408/80 - 408/80 simplified gives 51/10
- So, 84/20 + 72/80 = 51/10
In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+72/80 84/60+72/80