Answer:
20%
of a number means
20/100 of a number.
20/100=0.2 we can say that
0.2
x
, where
x
is a number we don't know,
=
18
.
0.2
x
=
18
Divide both sides by
0.2
.
x
=
90
We can check this by finding
20
%
of
90
and seeing that it is equal to
18
.
90(0.2)=18
Step-by-step explanation:
