Answers

Subtract 45/40 from 90/36

1^st number: 2 18/36, 2^nd number: 1 5/40

90/36 - 45/40 is 11/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 36 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 36 × 10 = 360,
   90/36 = 90 × 10/36 × 10 = 900/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   45/40 = 45 × 9/40 × 9 = 405/360
4. Subtract the two like fractions:
   900/360 - 405/360 = 900 - 405/360 = 495/360
5. After reducing the fraction, the answer is 11/8
6. In mixed form: 13/8

MathStep (Works offline)

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

Related: ⁹⁰/₃₆-⁹⁰/₄₀ ⁹⁰/₇₂-⁴⁵/₄₀ ⁹⁰/₃₆-⁴⁵/₈₀

Subtract Fractions Calculator