Answers

Subtract 36/63 from 21/49

21/49 - 36/63 is -1/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 63 is 441
   
   Next, find the equivalent fraction of both fractional numbers with denominator 441
2. For the 1st fraction, since 49 × 9 = 441,
   21/49 = 21 × 9/49 × 9 = 189/441
3. Likewise, for the 2nd fraction, since 63 × 7 = 441,
   36/63 = 36 × 7/63 × 7 = 252/441
4. Subtract the two like fractions:
   189/441 - 252/441 = 189 - 252/441 = -63/441
5. After reducing the fraction, the answer is -1/7

MathStep (Works offline)

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

Related: ⁴²/₄₉-³⁶/₆₃ ²¹/₄₉-⁷²/₆₃ ²¹/₉₈-³⁶/₆₃ ⁶³/₄₉-³⁶/₆₃

Subtract Fractions Calculator