Add 45/25 and 3/21
1st number: 1 20/25, 2nd number: 3/21
45/25 + 3/21 is 68/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
45/25 = 45 × 21/25 × 21 = 945/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
3/21 = 3 × 25/21 × 25 = 75/525 - Add the two like fractions:
945/525 + 75/525 = 945 + 75/525 = 1020/525 - 1020/525 simplified gives 68/35
- So, 45/25 + 3/21 = 68/35
In mixed form: 133/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25+3/21 45/25+6/21 45/50+3/21 45/25+3/42 45/25+9/21 45/75+3/21 45/25+3/63 45/25+15/21