Answers

Subtract 81/40 from 30/96

1^st number: 30/96, 2^nd number: 2 1/40

30/96 - 81/40 is -137/80.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 96 and 40 is 480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 480
2. For the 1st fraction, since 96 × 5 = 480,
   30/96 = 30 × 5/96 × 5 = 150/480
3. Likewise, for the 2nd fraction, since 40 × 12 = 480,
   81/40 = 81 × 12/40 × 12 = 972/480
4. Subtract the two like fractions:
   150/480 - 972/480 = 150 - 972/480 = -822/480
5. After reducing the fraction, the answer is -137/80

MathStep (Works offline)

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

Related: ⁶⁰/₉₆-⁸¹/₄₀ ³⁰/₉₆-⁸¹/₈₀ ⁹⁰/₉₆-⁸¹/₄₀

Subtract Fractions Calculator