Share 'who can i rounding in intervals of 0.05'

hello I need to know if there is any way to alter the rounding so that the approximations are made with an interval of 0.05. If the result is 0.49  I need with rounded to 0.50 but the result is 0.46 need to be with rounded to 0.45 or 0.13 is with rounded to 0.15. there is probably an expression to do this but I could not find it. regards regards