Modifying the "index/match" formula not to populate blank cells with zero's

I’m using a “INDEX / MATCH” formula to pickup only the last 100 entries - thus keeping my information current...

=INDEX(WORK!M:M,MATCH(99^99,WORK!$A:$A,1)-100+(ROW(WORK!M2)-1))

and it works great except when a cell is blank it'll place a "0"

I need to modify the formula to show the blank cells instead of picking up 0’s since some cells contain “0”…any suggestions? I've tried adding "IFERROR" with no avail...

Format cells as ....

0;-0;;@

=if(index(work!m:m,match(99^99,work!$a:$a,1)-100+(row(work!m2)-1))=0,"",index(work!m:m,match(99^99,work!$a:$a,1)-100+(row(work!m2)-1)))