how do you write 19/25 as a decimal get it right I will mark you as brainliest and give you extra points

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

How do you solve a question like this?

Plz hurry evaluate the expression a+b where a=8 and b=19