Question

Tom and Katie are arguing about working out percentages of

amounts.
Tom says to find 40% you divide by 100 and multiply by 4.
Katie says to find 40% you divide by 5 and multiply by 2.
Who is correct?
A
D
Neither is
Only
correct
Tom
B
Only
Katie
Both Tom
and Katie

Answer 1

Only Katie is correct.

Explanation:

Suppose the amount is $50.

Find the 40% by Tom's method:

50 / 100 = 0.5

0.5 * 4 = $2

- which is 4% of 50.

By Katie's method

50 / 5 = 10

10 * 2 = $20

- which is 40% of 50.