Answers

Subtract 16/81 from 7/84

7/84 - 16/81 is -37/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 84 × 27 = 2268,
   7/84 = 7 × 27/84 × 27 = 189/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   16/81 = 16 × 28/81 × 28 = 448/2268
4. Subtract the two like fractions:
   189/2268 - 448/2268 = 189 - 448/2268 = -259/2268
5. After reducing the fraction, the answer is -37/324

MathStep (Works offline)

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

Related: ¹⁴/₈₄-¹⁶/₈₁ ⁷/₈₄-³²/₈₁ ²¹/₈₄-¹⁶/₈₁ ⁷/₈₄-⁴⁸/₈₁ ³⁵/₈₄-¹⁶/₈₁ ⁷/₈₄-⁸⁰/₈₁ ⁴⁹/₈₄-¹⁶/₈₁

Subtract Fractions Calculator