HOW I WRITE 12=10 OR 16=20 in excel

[RANA]

if A1=12531 how i wrote in 12530 IN B2 coloum

 

[Mike H]

=A1-1
--
Mike

When competing hypotheses are otherwise equal, adopt the hypothesis that
introduces the fewest assumptions while still sufficiently answering the
question.

 

[Teethless mama]

=ROUND(A1,-1)