Add 45/2 and 20/21
1st number: 22 1/2, 2nd number: 20/21
45/2 + 20/21 is 985/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
45/2 = 45 × 21/2 × 21 = 945/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Add the two like fractions:
945/42 + 40/42 = 945 + 40/42 = 985/42 - So, 45/2 + 20/21 = 985/42
In mixed form: 2319/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/2+20/21 45/2+40/21 45/4+20/21 45/2+20/42 45/2+60/21 45/6+20/21 45/2+20/63 45/10+20/21 45/14+20/21