Answers

Subtract 9/3 from 42/84

1^st number: 42/84, 2^nd number: 3 0/3

42/84 - 9/3 is -5/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 3 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   42/84 = 42 × 1/84 × 1 = 42/84
3. Likewise, for the 2nd fraction, since 3 × 28 = 84,
   9/3 = 9 × 28/3 × 28 = 252/84
4. Subtract the two like fractions:
   42/84 - 252/84 = 42 - 252/84 = -210/84
5. After reducing the fraction, the answer is -5/2

MathStep (Works offline)

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

Related: ⁴²/₈₄-¹⁸/₃ ⁴²/₈₄-⁹/₆ ⁴²/₈₄-²⁷/₃ ⁴²/₈₄-⁴⁵/₃ ⁴²/₈₄-⁹/₁₅ ⁴²/₈₄-⁶³/₃ ⁴²/₈₄-⁹/₂₁

Subtract Fractions Calculator