Answers

Add 54/15 and 21/75

1^st number: 3 9/15, 2^nd number: 21/75

54/15 + 21/75 is 97/25.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 75 is 75
   
   Next, find the equivalent fraction of both fractional numbers with denominator 75
2. For the 1st fraction, since 15 × 5 = 75,
   54/15 = 54 × 5/15 × 5 = 270/75
3. Likewise, for the 2nd fraction, since 75 × 1 = 75,
   21/75 = 21 × 1/75 × 1 = 21/75
4. Add the two like fractions:
   270/75 + 21/75 = 270 + 21/75 = 291/75
5. 291/75 simplified gives 97/25
6. So, 54/15 + 21/75 = 97/25
   In mixed form: 322/25

MathStep (Works offline)

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

Related: ⁵⁴/₁₅+⁴²/₇₅ ⁵⁴/₃₀+²¹/₇₅ ⁵⁴/₁₅+⁶³/₇₅ ⁵⁴/₄₅+²¹/₇₅ ⁵⁴/₇₅+²¹/₇₅

Add Fractions Calculator