avapuppy123
avapuppy123 avapuppy123
  • 26-01-2015
  • Mathematics
contestada

80% of a number is 96.

What is 25% of that same number?

A.
20

B.
30

C.
40

D.
120

Respuesta :

ValyRemus
ValyRemus ValyRemus
  • 26-01-2015
[tex] \frac{80}{100}*x=96 [/tex] ⇒ [tex] \frac{80\div20}{100\div20} *x=96[/tex]

[tex] \frac{4}{5}*x=96 [/tex] ⇒ [tex]x= \frac{96*5}{4}=24*5 [/tex]

[tex]\boxed {x=120}[/tex]

[tex] \frac{25}{100}*x= \frac{25\div25}{100\div25}*120 = \frac{120}{4} = \boxed {30} [/tex]

The answer is B.
Answer Link
logo88
logo88 logo88
  • 26-01-2015
let the number be x
80%*x=96
x=96/80%
x=120
then 25% of 120 is your answer to find this half 120 twice
half 120=60
half 60=30

Therefore 30 is the answer which is B
Answer Link

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