(B3=7.5, e.g.), B3 - INT(B3) ===> 7.5 -7=.5 <=== any difference greater zero means you had a decimal number.
B3=15.0 ===> 15.0 - 15=0 <===a difference of zero means you had a whole number. If you have a row where all the differences between the original number and its integer add up to zero, that row is all whole numbers and needs to be deleted.
{=IF(SUM(A9:G9-INT(A9:G9))=0,"DELETE ROW","")}
This is an array (CSE) formula and it WILL NOT WORK if you type the { and the }. Type everything but those (in cell H9, perhaps), then press Ctrl-Shift-Enter (hence the CSE).