Answers

Subtract 21/36 from 90/6

1^st number: 15 0/6, 2^nd number: 21/36

90/6 - 21/36 is 173/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 6 and 36 is 36
   
   Next, find the equivalent fraction of both fractional numbers with denominator 36
2. For the 1st fraction, since 6 × 6 = 36,
   90/6 = 90 × 6/6 × 6 = 540/36
3. Likewise, for the 2nd fraction, since 36 × 1 = 36,
   21/36 = 21 × 1/36 × 1 = 21/36
4. Subtract the two like fractions:
   540/36 - 21/36 = 540 - 21/36 = 519/36
5. After reducing the fraction, the answer is 173/12
6. In mixed form: 145/12

MathStep (Works offline)

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

Related: ⁹⁰/₆-⁴²/₃₆ ⁹⁰/₁₂-²¹/₃₆ ⁹⁰/₆-²¹/₇₂ ⁹⁰/₆-⁶³/₃₆ ⁹⁰/₁₈-²¹/₃₆ ⁹⁰/₃₀-²¹/₃₆ ⁹⁰/₄₂-²¹/₃₆

Subtract Fractions Calculator