Add 72/28 and 12/80
1st number: 2 16/28, 2nd number: 12/80
72/28 + 12/80 is 381/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
72/28 = 72 × 20/28 × 20 = 1440/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
12/80 = 12 × 7/80 × 7 = 84/560 - Add the two like fractions:
1440/560 + 84/560 = 1440 + 84/560 = 1524/560 - 1524/560 simplified gives 381/140
- So, 72/28 + 12/80 = 381/140
In mixed form: 2101/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28+24/80 72/56+12/80 72/28+36/80 72/84+12/80 72/28+60/80 72/28+84/80