Answers

Add 25/42 and 90/21

1^st number: 25/42, 2^nd number: 4 6/21

25/42 + 90/21 is 205/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 21 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   25/42 = 25 × 1/42 × 1 = 25/42
3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
   90/21 = 90 × 2/21 × 2 = 180/42
4. Add the two like fractions:
   25/42 + 180/42 = 25 + 180/42 = 205/42
5. So, 25/42 + 90/21 = 205/42
   In mixed form: 437/42

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁵⁰/₄₂+⁹⁰/₂₁ ²⁵/₈₄+⁹⁰/₂₁ ²⁵/₄₂+⁹⁰/₄₂ ⁷⁵/₄₂+⁹⁰/₂₁ ²⁵/₄₂+⁹⁰/₆₃

Add Fractions Calculator