Add 25/20 and 63/72
1st number: 1 5/20, 2nd number: 63/72
25/20 + 63/72 is 17/8.
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,
25/20 = 25 × 18/20 × 18 = 450/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
63/72 = 63 × 5/72 × 5 = 315/360 - Add the two like fractions:
450/360 + 315/360 = 450 + 315/360 = 765/360 - 765/360 simplified gives 17/8
- So, 25/20 + 63/72 = 17/8
In mixed form: 21/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/20+63/72 25/40+63/72 75/20+63/72 25/60+63/72