What is 0.87 repeating written as a decimal?

Answer 1

It is not possible to show it here but

if the number is 0.8777... then it is written as 0.87 with a dot above the seven; and

if it is 0.8787... then it is written as 0.87 with a dot above the eight and the seven.

Answer 2

It is: 29/33 as a fraction in its lowest terms = 0.878787...repeating

Or place dots over 8 and 7 to indicate a repeating decimal