Answers

Subtract 8/81 from 84/80

1^st number: 1 4/80, 2^nd number: 8/81

84/80 - 8/81 is 1541/1620.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   84/80 = 84 × 81/80 × 81 = 6804/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   8/81 = 8 × 80/81 × 80 = 640/6480
4. Subtract the two like fractions:
   6804/6480 - 640/6480 = 6804 - 640/6480 = 6164/6480
5. After reducing the fraction, the answer is 1541/1620

MathStep (Works offline)

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

Related: ⁸⁴/₈₀-¹⁶/₈₁ ⁸⁴/₈₀-²⁴/₈₁ ⁸⁴/₈₀-⁴⁰/₈₁ ⁸⁴/₈₀-⁵⁶/₈₁

Subtract Fractions Calculator