Granddaughter 3022

Grandpa was pulling beets. The balance of forces of the participants was as follows:

Grandfather : grandmother : granddaughter : dog : cat : mouse = 8:5:3:2.5:2:0.2.

How many grandfathers would it take to pull out the beets?
How many mice would be needed?

Correct answer:

a =  3
b =  104

Step-by-step explanation:

$$\begin{gathered} f=8+5+3+2.5+2+0.2=20.7 \\ a=f/8=20.7/8=3 \end{gathered}$$

$b=f/0.2=20.7/0.2=104$

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