Add 75/21 and 18/5
1st number: 3 12/21, 2nd number: 3 3/5
75/21 + 18/5 is 251/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
75/21 = 75 × 5/21 × 5 = 375/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
18/5 = 18 × 21/5 × 21 = 378/105 - Add the two like fractions:
375/105 + 378/105 = 375 + 378/105 = 753/105 - 753/105 simplified gives 251/35
- So, 75/21 + 18/5 = 251/35
In mixed form: 76/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+36/5 75/42+18/5 75/21+18/10 75/21+54/5 75/63+18/5 75/21+18/15 75/21+90/5 75/21+18/25 75/21+18/35