Answers

Subtract 16/18 from 21/50

21/50 - 16/18 is -211/450.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 18 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 50 × 9 = 450,
   21/50 = 21 × 9/50 × 9 = 189/450
3. Likewise, for the 2nd fraction, since 18 × 25 = 450,
   16/18 = 16 × 25/18 × 25 = 400/450
4. Subtract the two like fractions:
   189/450 - 400/450 = 189 - 400/450 = -211/450

MathStep (Works offline)

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

Related: ⁴²/₅₀-¹⁶/₁₈ ²¹/₅₀-³²/₁₈ ²¹/₅₀-¹⁶/₃₆ ⁶³/₅₀-¹⁶/₁₈ ²¹/₅₀-⁴⁸/₁₈ ²¹/₅₀-¹⁶/₅₄ ²¹/₅₀-⁸⁰/₁₈ ²¹/₅₀-¹⁶/₉₀

Subtract Fractions Calculator