Hi, Thanks in advance if you can help.

I need two seperate equations to find the number above and below a specific
number from a list of numbers in accending order.

for example my specific number is 875, I need to find the number (only one
number) which is immediately less than 875, and the number that is
immidiately higher than 875 from the list below.

The two equations should give me 850 and 900 in seperate cells.

500
550
600
650
700
750
800
850
900
950
1000