Answers

Subtract 56/20 from 16/45

1^st number: 16/45, 2^nd number: 2 16/20

16/45 - 56/20 is -22/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   16/45 = 16 × 4/45 × 4 = 64/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   56/20 = 56 × 9/20 × 9 = 504/180
4. Subtract the two like fractions:
   64/180 - 504/180 = 64 - 504/180 = -440/180
5. After reducing the fraction, the answer is -22/9

MathStep (Works offline)

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

Related: ³²/₄₅-⁵⁶/₂₀ ¹⁶/₉₀-⁵⁶/₂₀ ¹⁶/₄₅-⁵⁶/₄₀ ⁴⁸/₄₅-⁵⁶/₂₀ ¹⁶/₄₅-⁵⁶/₆₀ ⁸⁰/₄₅-⁵⁶/₂₀

Subtract Fractions Calculator