I think the rate is 6.666666667 which is 6.66
The answer is 6. You multiply 60 by the .45 and the 35% (which is .35) the subtract the .35 from the .45 (27-21) you get 6.
Yes they are proportional. We can say that the new design is just a larger version of the smaller one. Now, <span>If the design and the cover are similar quadrilaterals then they should be corresponding, as it is the case in this example</span>
Divide 7 and 217 and you have 31 so there are 31 pens in each case