Add 21/60 and 9/63
21/60 + 9/63 is 69/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
21/60 = 21 × 21/60 × 21 = 441/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
9/63 = 9 × 20/63 × 20 = 180/1260 - Add the two like fractions:
441/1260 + 180/1260 = 441 + 180/1260 = 621/1260 - 621/1260 simplified gives 69/140
- So, 21/60 + 9/63 = 69/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+9/63 21/60+18/63 63/60+9/63 21/60+27/63 21/60+45/63