Add 21/75 and 6/45
21/75 + 6/45 is 31/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
21/75 = 21 × 3/75 × 3 = 63/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
6/45 = 6 × 5/45 × 5 = 30/225 - Add the two like fractions:
63/225 + 30/225 = 63 + 30/225 = 93/225 - 93/225 simplified gives 31/75
- So, 21/75 + 6/45 = 31/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75+6/45 21/75+12/45 21/75+6/90 63/75+6/45 21/75+18/45 21/75+30/45 21/75+42/45