Answers

Add 54/12 and 81/40

1^st number: 4 6/12, 2^nd number: 2 1/40

54/12 + 81/40 is 261/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 12 × 10 = 120,
   54/12 = 54 × 10/12 × 10 = 540/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   81/40 = 81 × 3/40 × 3 = 243/120
4. Add the two like fractions:
   540/120 + 243/120 = 540 + 243/120 = 783/120
5. 783/120 simplified gives 261/40
6. So, 54/12 + 81/40 = 261/40
   In mixed form: 621/40

MathStep (Works offline)

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

Related: ⁵⁴/₂₄+⁸¹/₄₀ ⁵⁴/₁₂+⁸¹/₈₀ ⁵⁴/₃₆+⁸¹/₄₀ ⁵⁴/₆₀+⁸¹/₄₀ ⁵⁴/₈₄+⁸¹/₄₀

Add Fractions Calculator