A fraction is written in terms of two parts: the number on top is called the numerator and the number on the bottom is called the denominator. We can use the division method to solve this question. To get a decimal, simply divide the numerator 20 by the denominator 7:
20 (numerator) ÷ 7 (denominator) = 2.86
As a result, you get 2.86 as your answer when you convert 2 6/7 (or 20/7) to a decimal.