Answers

Add 21/20 and 45/54

1^st number: 1 1/20, 2^nd number: 45/54

21/20 + 45/54 is 113/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 54 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 54 × 10 = 540,
   45/54 = 45 × 10/54 × 10 = 450/540
4. Add the two like fractions:
   567/540 + 450/540 = 567 + 450/540 = 1017/540
5. 1017/540 simplified gives 113/60
6. So, 21/20 + 45/54 = 113/60
   In mixed form: 153/60

MathStep (Works offline)

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

Related: ⁴²/₂₀+⁴⁵/₅₄ ²¹/₂₀+⁹⁰/₅₄ ²¹/₄₀+⁴⁵/₅₄ ⁶³/₂₀+⁴⁵/₅₄ ²¹/₆₀+⁴⁵/₅₄

Add Fractions Calculator