The expression is (4x) of 240.

                 (Substitute x = 10) \ \

The percent is 40 and the whole is 240. You need to find the part.

Let n represent the number.

Part = percent whole

n = 0.4240               (Substitute percent = 0.4 and whole = 240)

n = 96                         (Multiply: )

96 is 40 of 240.