You can force the verb to be rank 0 but doing that in table may not be a
good idea.
table=:1 : (':'; '(((#~LF-.@e.])5!:5<''u'');,.y),.({.;}.)":x,y u"0/x')~
1 2 3 (+ %) table 0 1 2 3
+---+---------------+
|+ %|0 1 2 3|
+---+---------------+
|1 |_ 2 1.5 1.33333|
|2 |_ 3 2.5 2.33333|
|3 |_ 4 3.5 3.33333|
+---+---------------+
This makes it clear that it is rank 0.
1 2 3 (+ %)"0 table 0 1 2 3
+-------+---------------+
|(+ %)"0|0 1 2 3|
+-------+---------------+
|1 |_ 2 1.5 1.33333|
|2 |_ 3 2.5 2.33333|
|3 |_ 4 3.5 3.33333|
+-------+---------------+
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