Answers

Subtract 4/21 from 3/75

3/75 - 4/21 is -79/525.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 21 is 525
   
   Next, find the equivalent fraction of both fractional numbers with denominator 525
2. For the 1st fraction, since 75 × 7 = 525,
   3/75 = 3 × 7/75 × 7 = 21/525
3. Likewise, for the 2nd fraction, since 21 × 25 = 525,
   4/21 = 4 × 25/21 × 25 = 100/525
4. Subtract the two like fractions:
   21/525 - 100/525 = 21 - 100/525 = -79/525

MathStep (Works offline)

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

Related: ⁶/₇₅-⁴/₂₁ ³/₇₅-⁸/₂₁ ³/₇₅-⁴/₄₂ ⁹/₇₅-⁴/₂₁ ³/₇₅-¹²/₂₁ ³/₇₅-⁴/₆₃ ¹⁵/₇₅-⁴/₂₁ ³/₇₅-²⁰/₂₁ ²¹/₇₅-⁴/₂₁ ³/₇₅-²⁸/₂₁

Subtract Fractions Calculator