Answers

Add 21/20 and 54/27

1^st number: 1 1/20, 2^nd number: 2 0/27

21/20 + 54/27 is 61/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 27 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   21/20 = 21 × 27/20 × 27 = 567/540
3. Likewise, for the 2nd fraction, since 27 × 20 = 540,
   54/27 = 54 × 20/27 × 20 = 1080/540
4. Add the two like fractions:
   567/540 + 1080/540 = 567 + 1080/540 = 1647/540
5. 1647/540 simplified gives 61/20
6. So, 21/20 + 54/27 = 61/20
   In mixed form: 31/20

MathStep (Works offline)

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

Related: ⁴²/₂₀+⁵⁴/₂₇ ²¹/₄₀+⁵⁴/₂₇ ⁶³/₂₀+⁵⁴/₂₇ ²¹/₆₀+⁵⁴/₂₇ ²¹/₂₀+⁵⁴/₈₁

Add Fractions Calculator