Answers

Subtract 20/49 from 15/64

15/64 - 20/49 is -545/3136.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 49 is 3136
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3136
2. For the 1st fraction, since 64 × 49 = 3136,
   15/64 = 15 × 49/64 × 49 = 735/3136
3. Likewise, for the 2nd fraction, since 49 × 64 = 3136,
   20/49 = 20 × 64/49 × 64 = 1280/3136
4. Subtract the two like fractions:
   735/3136 - 1280/3136 = 735 - 1280/3136 = -545/3136

MathStep (Works offline)

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

Related: ³⁰/₆₄-²⁰/₄₉ ¹⁵/₆₄-⁴⁰/₄₉ ¹⁵/₆₄-²⁰/₉₈ ⁴⁵/₆₄-²⁰/₄₉ ¹⁵/₆₄-⁶⁰/₄₉ ⁷⁵/₆₄-²⁰/₄₉

Subtract Fractions Calculator