Add 20/63 and 45/21
1st number: 20/63, 2nd number: 2 3/21
20/63 + 45/21 is 155/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
45/21 = 45 × 3/21 × 3 = 135/63 - Add the two like fractions:
20/63 + 135/63 = 20 + 135/63 = 155/63 - So, 20/63 + 45/21 = 155/63
In mixed form: 229/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63+45/21 20/63+90/21 20/63+45/42 60/63+45/21 20/63+45/63