Add 2/21 and 4/45
2/21 + 4/45 is 58/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
4/45 = 4 × 7/45 × 7 = 28/315 - Add the two like fractions:
30/315 + 28/315 = 30 + 28/315 = 58/315 - So, 2/21 + 4/45 = 58/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+4/45 2/21+8/45 2/42+4/45 2/21+4/90 6/21+4/45 2/21+12/45 2/63+4/45 10/21+4/45 2/21+20/45 14/21+4/45 2/21+28/45