Answers

Subtract 21/18 from 54/75

1^st number: 54/75, 2^nd number: 1 3/18

54/75 - 21/18 is -67/150.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 18 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 75 × 6 = 450,
   54/75 = 54 × 6/75 × 6 = 324/450
3. Likewise, for the 2nd fraction, since 18 × 25 = 450,
   21/18 = 21 × 25/18 × 25 = 525/450
4. Subtract the two like fractions:
   324/450 - 525/450 = 324 - 525/450 = -201/450
5. After reducing the fraction, the answer is -67/150

MathStep (Works offline)

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

Related: ⁵⁴/₇₅-⁴²/₁₈ ⁵⁴/₇₅-²¹/₃₆ ⁵⁴/₇₅-⁶³/₁₈ ⁵⁴/₇₅-²¹/₅₄ ⁵⁴/₇₅-²¹/₉₀

Subtract Fractions Calculator