Answers

Add 45/81 and 21/7

1^st number: 45/81, 2^nd number: 3 0/7

45/81 + 21/7 is 32/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 7 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   45/81 = 45 × 7/81 × 7 = 315/567
3. Likewise, for the 2nd fraction, since 7 × 81 = 567,
   21/7 = 21 × 81/7 × 81 = 1701/567
4. Add the two like fractions:
   315/567 + 1701/567 = 315 + 1701/567 = 2016/567
5. 2016/567 simplified gives 32/9
6. So, 45/81 + 21/7 = 32/9
   In mixed form: 35/9

MathStep (Works offline)

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

Related: ⁹⁰/₈₁+²¹/₇ ⁴⁵/₈₁+⁴²/₇ ⁴⁵/₈₁+²¹/₁₄ ⁴⁵/₈₁+⁶³/₇ ⁴⁵/₈₁+²¹/₃₅ ⁴⁵/₈₁+²¹/₄₉

Add Fractions Calculator