Add 30/25 and 30/21
1st number: 1 5/25, 2nd number: 1 9/21
30/25 + 30/21 is 92/35.
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,
30/25 = 30 × 21/25 × 21 = 630/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
30/21 = 30 × 25/21 × 25 = 750/525 - Add the two like fractions:
630/525 + 750/525 = 630 + 750/525 = 1380/525 - 1380/525 simplified gives 92/35
- So, 30/25 + 30/21 = 92/35
In mixed form: 222/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/25+30/21 30/25+60/21 30/50+30/21 30/25+30/42 90/25+30/21 30/25+90/21 30/75+30/21 30/25+30/63