Add 72/20 and 45/25
1st number: 3 12/20, 2nd number: 1 20/25
72/20 + 45/25 is 27/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
72/20 = 72 × 5/20 × 5 = 360/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
45/25 = 45 × 4/25 × 4 = 180/100 - Add the two like fractions:
360/100 + 180/100 = 360 + 180/100 = 540/100 - 540/100 simplified gives 27/5
- So, 72/20 + 45/25 = 27/5
In mixed form: 52/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+90/25 72/40+45/25 72/20+45/50 72/60+45/25 72/20+45/75