Answers

Subtract 20/90 from 15/9

1^st number: 1 6/9, 2^nd number: 20/90

15/9 - 20/90 is 13/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 9 × 10 = 90,
   15/9 = 15 × 10/9 × 10 = 150/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   20/90 = 20 × 1/90 × 1 = 20/90
4. Subtract the two like fractions:
   150/90 - 20/90 = 150 - 20/90 = 130/90
5. After reducing the fraction, the answer is 13/9
6. In mixed form: 14/9

MathStep (Works offline)

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

Related: ³⁰/₉-²⁰/₉₀ ¹⁵/₉-⁴⁰/₉₀ ¹⁵/₁₈-²⁰/₉₀ ⁴⁵/₉-²⁰/₉₀ ¹⁵/₉-⁶⁰/₉₀ ¹⁵/₂₇-²⁰/₉₀ ⁷⁵/₉-²⁰/₉₀ ¹⁵/₄₅-²⁰/₉₀ ¹⁵/₆₃-²⁰/₉₀

Subtract Fractions Calculator