Add 18/25 and 75/21
1st number: 18/25, 2nd number: 3 12/21
18/25 + 75/21 is 751/175.
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,
18/25 = 18 × 21/25 × 21 = 378/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
75/21 = 75 × 25/21 × 25 = 1875/525 - Add the two like fractions:
378/525 + 1875/525 = 378 + 1875/525 = 2253/525 - 2253/525 simplified gives 751/175
- So, 18/25 + 75/21 = 751/175
In mixed form: 451/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/25+75/21 18/50+75/21 18/25+75/42 54/25+75/21 18/75+75/21 18/25+75/63 90/25+75/21