Question 120358
yeah let me try this in an easier way..

so he can type 66 in 1.5 minutes.. ok

Well if we add 2 to 1.5, we get 3.5, so we need to use a simple fraction of 1.5 that the denominator is a factor of 66, then we can multiply that to the amount needed to get 3.5

so lets see...

1/3 of 1.5 = x

Well 1/3 of 15 is 5, so this is .5

so..

x=.5

so lets see, we divided 1.5 by 3, now we need to divide 66 by 3.

66/3=y

so...

66/3=22


so now we have 22 words per 0.5 minutes.  
now we need to know how many times that goes into 3.5

3.5/x=z
3.5/.5=z
z=7

and now you need to multiply the OTHER SIDE!

7y=u
7*22=u
u=154

he can type 154 words in 3.5 minutes..