Answers

Subtract 15/90 from 70/84

70/84 - 15/90 is 2/3.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   70/84 = 70 × 15/84 × 15 = 1050/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   15/90 = 15 × 14/90 × 14 = 210/1260
4. Subtract the two like fractions:
   1050/1260 - 210/1260 = 1050 - 210/1260 = 840/1260
5. After reducing the fraction, the answer is 2/3

MathStep (Works offline)

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

Related: ⁷⁰/₈₄-³⁰/₉₀ ⁷⁰/₈₄-⁴⁵/₉₀ ⁷⁰/₈₄-⁷⁵/₉₀

Subtract Fractions Calculator