If Function and time Conversion help

[Alphabex]

I have a table and I am doing a time calculation in
Column A
Mgr Adjustments
60
30
450
0
0
50
65

Column B
Formula =A6*1/60 ----this converts the value in column A to increments of time clock time (.25, .5, etc) But when the number in that column is value of 450, I don't want this to calculate, and instead return a zero result.

I need to add in an IF function that will ignore any of the entries that value 450, and the result would be Zero instead of 7.5
help!

[FDibbins]

Try this...
=IF(A6=450,0,A6/60)

Note: you dont need the *1 in there

[Alphabex]

that works. Thank you so much Ford!