Add 72/20 and 5/9
1st number: 3 12/20, 2nd number: 5/9
72/20 + 5/9 is 187/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
5/9 = 5 × 20/9 × 20 = 100/180 - Add the two like fractions:
648/180 + 100/180 = 648 + 100/180 = 748/180 - 748/180 simplified gives 187/45
- So, 72/20 + 5/9 = 187/45
In mixed form: 47/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+10/9 72/40+5/9 72/20+5/18 72/20+15/9 72/60+5/9 72/20+5/27 72/20+25/9 72/20+5/45 72/20+35/9 72/20+5/63