Add 63/20 and 72/45
1st number: 3 3/20, 2nd number: 1 27/45
63/20 + 72/45 is 19/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
63/20 = 63 × 9/20 × 9 = 567/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180 - Add the two like fractions:
567/180 + 288/180 = 567 + 288/180 = 855/180 - 855/180 simplified gives 19/4
- So, 63/20 + 72/45 = 19/4
In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/40+72/45 63/20+72/90 63/60+72/45