Answers

Subtract 84/49 from 1/21

1^st number: 1/21, 2^nd number: 1 35/49

1/21 - 84/49 is -5/3.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 49 is 147
   
   Next, find the equivalent fraction of both fractional numbers with denominator 147
2. For the 1st fraction, since 21 × 7 = 147,
   1/21 = 1 × 7/21 × 7 = 7/147
3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
   84/49 = 84 × 3/49 × 3 = 252/147
4. Subtract the two like fractions:
   7/147 - 252/147 = 7 - 252/147 = -245/147
5. After reducing the fraction, the answer is -5/3

MathStep (Works offline)

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

Related: ²/₂₁-⁸⁴/₄₉ ¹/₄₂-⁸⁴/₄₉ ¹/₂₁-⁸⁴/₉₈ ³/₂₁-⁸⁴/₄₉ ¹/₆₃-⁸⁴/₄₉ ⁵/₂₁-⁸⁴/₄₉ ⁷/₂₁-⁸⁴/₄₉

Subtract Fractions Calculator