Add 18/45 and 60/20
1st number: 18/45, 2nd number: 3 0/20
18/45 + 60/20 is 17/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
18/45 = 18 × 4/45 × 4 = 72/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
60/20 = 60 × 9/20 × 9 = 540/180 - Add the two like fractions:
72/180 + 540/180 = 72 + 540/180 = 612/180 - 612/180 simplified gives 17/5
- So, 18/45 + 60/20 = 17/5
In mixed form: 32/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45+60/20 18/90+60/20 18/45+60/40 54/45+60/20 90/45+60/20