Question

When a spaceship full of scientists landed on Planet Q, they found that 17/40 of the 160 aliens had 3 eyes. How many aliens had 3 eyes?

Answer 1

Answer:

68 aliens

Step-by-step explanation:

Take the fraction of aliens that had 3 eyes and multiply by the number of aliens

17 / 40 * 160 =

17 * 160/40

17 *4

68

Answer 2

Answer:

68 out of 160 aliens have 3 eyes

Step-by-step explanation:

If 17 out of 40 aliens have 3 eyes, then $\frac{17}{40} = \frac{x}{160}$

17 * 160 = 2720

40 * x = 40x

40x = 2720

- - - - - - - - - - - - -

$\frac{40}{40} x = \frac{2720}{40}\\\\x = \frac{2720}{40}\\\\x = 68$

Therefore 68 out of 160 aliens have 3 eyes