please help me simplify these!!

Question

2x/5x

x^2/x

15x^2/6x

20x^2/5x^6

Answer 1

2x/5x = 2/5
x^2/x = x^(2-1) = x
20x^2/5x^6 = 20/4 x^(2-6) = 5x^-4 = 5/x^4