Answers

Subtract 96/90 from 15/80

1^st number: 15/80, 2^nd number: 1 6/90

15/80 - 96/90 is -211/240.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 90 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   15/80 = 15 × 9/80 × 9 = 135/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   96/90 = 96 × 8/90 × 8 = 768/720
4. Subtract the two like fractions:
   135/720 - 768/720 = 135 - 768/720 = -633/720
5. After reducing the fraction, the answer is -211/240

MathStep (Works offline)

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

Related: ³⁰/₈₀-⁹⁶/₉₀ ⁴⁵/₈₀-⁹⁶/₉₀ ⁷⁵/₈₀-⁹⁶/₉₀

Subtract Fractions Calculator