Answers

Subtract 56/54 from 18/90

1^st number: 18/90, 2^nd number: 1 2/54

18/90 - 56/54 is -113/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 90 × 3 = 270,
   18/90 = 18 × 3/90 × 3 = 54/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   56/54 = 56 × 5/54 × 5 = 280/270
4. Subtract the two like fractions:
   54/270 - 280/270 = 54 - 280/270 = -226/270
5. After reducing the fraction, the answer is -113/135

MathStep (Works offline)

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

Related: ³⁶/₉₀-⁵⁶/₅₄ ⁵⁴/₉₀-⁵⁶/₅₄

Subtract Fractions Calculator