Answers

Subtract 27/64 from 21/5

1^st number: 4 1/5, 2^nd number: 27/64

21/5 - 27/64 is 1209/320.

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,
   27/64 = 27 × 5/64 × 5 = 135/320
4. Subtract the two like fractions:
   1344/320 - 135/320 = 1344 - 135/320 = 1209/320
5. In mixed form: 3249/320

MathStep (Works offline)

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

Related: ⁴²/₅-²⁷/₆₄ ²¹/₅-⁵⁴/₆₄ ²¹/₁₀-²⁷/₆₄ ⁶³/₅-²⁷/₆₄ ²¹/₅-⁸¹/₆₄ ²¹/₁₅-²⁷/₆₄ ²¹/₂₅-²⁷/₆₄ ²¹/₃₅-²⁷/₆₄

Subtract Fractions Calculator