Add 72/18 and 16/20
1st number: 4 0/18, 2nd number: 16/20
72/18 + 16/20 is 24/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
72/18 = 72 × 10/18 × 10 = 720/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
16/20 = 16 × 9/20 × 9 = 144/180 - Add the two like fractions:
720/180 + 144/180 = 720 + 144/180 = 864/180 - 864/180 simplified gives 24/5
- So, 72/18 + 16/20 = 24/5
In mixed form: 44/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+32/20 72/36+16/20 72/18+16/40 72/18+48/20 72/54+16/20 72/18+16/60 72/18+80/20 72/90+16/20