Answers

Subtract 12/40 from 42/64

42/64 - 12/40 is 57/160.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 40 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 64 × 5 = 320,
   42/64 = 42 × 5/64 × 5 = 210/320
3. Likewise, for the 2nd fraction, since 40 × 8 = 320,
   12/40 = 12 × 8/40 × 8 = 96/320
4. Subtract the two like fractions:
   210/320 - 96/320 = 210 - 96/320 = 114/320
5. After reducing the fraction, the answer is 57/160

MathStep (Works offline)

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

Related: ⁸⁴/₆₄-¹²/₄₀ ⁴²/₆₄-²⁴/₄₀ ⁴²/₆₄-¹²/₈₀ ⁴²/₆₄-³⁶/₄₀ ⁴²/₆₄-⁶⁰/₄₀ ⁴²/₆₄-⁸⁴/₄₀

Subtract Fractions Calculator