Add 30/25 and 20/21
1st number: 1 5/25, 2nd number: 20/21
30/25 + 20/21 is 226/105.
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,
30/25 = 30 × 21/25 × 21 = 630/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
20/21 = 20 × 25/21 × 25 = 500/525 - Add the two like fractions:
630/525 + 500/525 = 630 + 500/525 = 1130/525 - 1130/525 simplified gives 226/105
- So, 30/25 + 20/21 = 226/105
In mixed form: 216/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/25+20/21 30/25+40/21 30/50+20/21 30/25+20/42 90/25+20/21 30/25+60/21 30/75+20/21 30/25+20/63