Add 14/21 and 25/45
14/21 + 25/45 is 11/9.
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,
14/21 = 14 × 15/21 × 15 = 210/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Add the two like fractions:
210/315 + 175/315 = 210 + 175/315 = 385/315 - 385/315 simplified gives 11/9
- So, 14/21 + 25/45 = 11/9
In mixed form: 12/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/21+25/45 14/21+50/45 14/42+25/45 14/21+25/90 42/21+25/45 14/21+75/45 14/63+25/45 70/21+25/45 98/21+25/45