Add 84/20 and 80/72
1st number: 4 4/20, 2nd number: 1 8/72
84/20 + 80/72 is 239/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
84/20 = 84 × 18/20 × 18 = 1512/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
80/72 = 80 × 5/72 × 5 = 400/360 - Add the two like fractions:
1512/360 + 400/360 = 1512 + 400/360 = 1912/360 - 1912/360 simplified gives 239/45
- So, 84/20 + 80/72 = 239/45
In mixed form: 514/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+80/72 84/60+80/72