Add 21/28 and 80/75
1st number: 21/28, 2nd number: 1 5/75
21/28 + 80/75 is 109/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 28 × 75 = 2100,
21/28 = 21 × 75/28 × 75 = 1575/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
80/75 = 80 × 28/75 × 28 = 2240/2100 - Add the two like fractions:
1575/2100 + 2240/2100 = 1575 + 2240/2100 = 3815/2100 - 3815/2100 simplified gives 109/60
- So, 21/28 + 80/75 = 109/60
In mixed form: 149/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+80/75 21/56+80/75 63/28+80/75 21/84+80/75