Add 72/28 and 12/45
1st number: 2 16/28, 2nd number: 12/45
72/28 + 12/45 is 298/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
72/28 = 72 × 45/28 × 45 = 3240/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
12/45 = 12 × 28/45 × 28 = 336/1260 - Add the two like fractions:
3240/1260 + 336/1260 = 3240 + 336/1260 = 3576/1260 - 3576/1260 simplified gives 298/105
- So, 72/28 + 12/45 = 298/105
In mixed form: 288/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28+24/45 72/56+12/45 72/28+12/90 72/28+36/45 72/84+12/45 72/28+60/45 72/28+84/45