Add 21/28 and 20/75
21/28 + 20/75 is 61/60.
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,
20/75 = 20 × 28/75 × 28 = 560/2100 - Add the two like fractions:
1575/2100 + 560/2100 = 1575 + 560/2100 = 2135/2100 - 2135/2100 simplified gives 61/60
- So, 21/28 + 20/75 = 61/60
In mixed form: 11/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+20/75 21/28+40/75 21/56+20/75 63/28+20/75 21/28+60/75 21/84+20/75