Add 21/75 and 12/45
21/75 + 12/45 is 41/75.
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,
12/45 = 12 × 5/45 × 5 = 60/225 - Add the two like fractions:
63/225 + 60/225 = 63 + 60/225 = 123/225 - 123/225 simplified gives 41/75
- So, 21/75 + 12/45 = 41/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75+12/45 21/75+24/45 21/75+12/90 63/75+12/45 21/75+36/45 21/75+60/45 21/75+84/45