Add 3/45 and 3/21
3/45 + 3/21 is 22/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
3/45 = 3 × 7/45 × 7 = 21/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
3/21 = 3 × 15/21 × 15 = 45/315 - Add the two like fractions:
21/315 + 45/315 = 21 + 45/315 = 66/315 - 66/315 simplified gives 22/105
- So, 3/45 + 3/21 = 22/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/45+3/21 3/45+6/21 3/90+3/21 3/45+3/42 9/45+3/21 3/45+9/21 3/45+3/63 15/45+3/21 3/45+15/21 21/45+3/21