Answers

Subtract 1/72 from 90/18

1^st number: 5 0/18, 2^nd number: 1/72

90/18 - 1/72 is 359/72.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 18 × 4 = 72,
   90/18 = 90 × 4/18 × 4 = 360/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   1/72 = 1 × 1/72 × 1 = 1/72
4. Subtract the two like fractions:
   360/72 - 1/72 = 360 - 1/72 = 359/72
5. In mixed form: 471/72

MathStep (Works offline)

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

Related: ⁹⁰/₁₈-²/₇₂ ⁹⁰/₃₆-¹/₇₂ ⁹⁰/₁₈-³/₇₂ ⁹⁰/₅₄-¹/₇₂ ⁹⁰/₁₈-⁵/₇₂ ⁹⁰/₁₈-⁷/₇₂

Subtract Fractions Calculator