Add 45/72 and 20/5
1st number: 45/72, 2nd number: 4 0/5
45/72 + 20/5 is 37/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
45/72 = 45 × 5/72 × 5 = 225/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
20/5 = 20 × 72/5 × 72 = 1440/360 - Add the two like fractions:
225/360 + 1440/360 = 225 + 1440/360 = 1665/360 - 1665/360 simplified gives 37/8
- So, 45/72 + 20/5 = 37/8
In mixed form: 45/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+20/5 45/72+40/5 45/72+20/10 45/72+60/5 45/72+20/15 45/72+20/25 45/72+20/35