Add 1/21 and 35/45
1/21 + 35/45 is 52/63.
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,
1/21 = 1 × 15/21 × 15 = 15/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
35/45 = 35 × 7/45 × 7 = 245/315 - Add the two like fractions:
15/315 + 245/315 = 15 + 245/315 = 260/315 - 260/315 simplified gives 52/63
- So, 1/21 + 35/45 = 52/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+35/45 1/21+70/45 1/42+35/45 1/21+35/90 3/21+35/45 1/63+35/45 5/21+35/45 7/21+35/45