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The photographer got the baby to smile in 30% of the photos he took. If the baby smiled in 12 photos, how many photos did the photographer

 Jan 20, 2021
 #1
avatar+41 
+1

30%=12 Pictures

30/3=10%
12/3=4 Pictures

 

10%=4 Pictures

10*10=100%
4*10=40 Pictures

So, the photographer took 40 pictures.

 Jan 20, 2021
 #2
avatar+266 
+4

You have

30%:12

10%:4

10*10%:4*10

100%:40

So, the photographer took 40 pics

 

cheekycheekycheeky

 Jan 20, 2021
 #3
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If the baby smiled in 30% of the pictures (aka 12 photos), the answer is simply 12/30%=40

 

Proof: 40*0.3=12 so it works

 Jan 20, 2021

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