Answers

Subtract 15/64 from 21/5

1^st number: 4 1/5, 2^nd number: 15/64

21/5 - 15/64 is 1269/320.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 64 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 5 × 64 = 320,
   21/5 = 21 × 64/5 × 64 = 1344/320
3. Likewise, for the 2nd fraction, since 64 × 5 = 320,
   15/64 = 15 × 5/64 × 5 = 75/320
4. Subtract the two like fractions:
   1344/320 - 75/320 = 1344 - 75/320 = 1269/320
5. In mixed form: 3309/320

MathStep (Works offline)

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

Related: ⁴²/₅-¹⁵/₆₄ ²¹/₅-³⁰/₆₄ ²¹/₁₀-¹⁵/₆₄ ⁶³/₅-¹⁵/₆₄ ²¹/₅-⁴⁵/₆₄ ²¹/₁₅-¹⁵/₆₄ ²¹/₅-⁷⁵/₆₄ ²¹/₂₅-¹⁵/₆₄ ²¹/₃₅-¹⁵/₆₄

Subtract Fractions Calculator