Add 45/20 and 54/72
1st number: 2 5/20, 2nd number: 54/72
45/20 + 54/72 is 3/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
45/20 = 45 × 18/20 × 18 = 810/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Add the two like fractions:
810/360 + 270/360 = 810 + 270/360 = 1080/360 - 1080/360 simplified gives 3/1
- So, 45/20 + 54/72 = 3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+54/72 45/40+54/72 45/60+54/72