Add 80/45 and 63/28
1st number: 1 35/45, 2nd number: 2 7/28
80/45 + 63/28 is 145/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 28 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
80/45 = 80 × 28/45 × 28 = 2240/1260 - Likewise, for the 2nd fraction, since 28 × 45 = 1260,
63/28 = 63 × 45/28 × 45 = 2835/1260 - Add the two like fractions:
2240/1260 + 2835/1260 = 2240 + 2835/1260 = 5075/1260 - 5075/1260 simplified gives 145/36
- So, 80/45 + 63/28 = 145/36
In mixed form: 41/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+63/28 80/45+63/56 80/45+63/84