Add 18/72 and 80/20
1st number: 18/72, 2nd number: 4 0/20
18/72 + 80/20 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
80/20 = 80 × 18/20 × 18 = 1440/360 - Add the two like fractions:
90/360 + 1440/360 = 90 + 1440/360 = 1530/360 - 1530/360 simplified gives 17/4
- So, 18/72 + 80/20 = 17/4
In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+80/20 18/72+80/40 54/72+80/20 18/72+80/60 90/72+80/20