Answers

Subtract 18/90 from 45/15

1^st number: 3 0/15, 2^nd number: 18/90

45/15 - 18/90 is 14/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 15 × 6 = 90,
   45/15 = 45 × 6/15 × 6 = 270/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   18/90 = 18 × 1/90 × 1 = 18/90
4. Subtract the two like fractions:
   270/90 - 18/90 = 270 - 18/90 = 252/90
5. After reducing the fraction, the answer is 14/5
6. In mixed form: 24/5

MathStep (Works offline)

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

Related: ⁹⁰/₁₅-¹⁸/₉₀ ⁴⁵/₁₅-³⁶/₉₀ ⁴⁵/₃₀-¹⁸/₉₀ ⁴⁵/₁₅-⁵⁴/₉₀ ⁴⁵/₇₅-¹⁸/₉₀

Subtract Fractions Calculator