**Answer:**

### c.30

**Step-by-step explanation:**

40

%

is the same as

40

100

, so taking the percent amount as

x

we write:

x

=

75

×

40

100

Dividing the numerator and the denominator by

25

, we get:

x

=

3

75

×

40

4

100

x

=

3

×

40

4

Dividing the numerator and the denominator by

4

, we get:

x

=

3

×

10

40

1

4

x

=

3

×

10

x

=

30