Question

Question is WHY DIVIDE BY 8?? in the 5th step??

Answer 1

Answer:

I agree with you that step 5 doesn't make sense.

In step 4 he had accurately determined that there were 216 British and Indian stamps.

B = number of British stamps

N = number of Indian stamps  (using N because "I" looks too much like a "1")

B + N = 216

3/5B = N

substitute for  N:

B + 3/5B = 216

8/5B = 216

divide both sides of the equation by 8:

1/5B = 27

multiply both sides of the equation by 5:

B = 135

N = 81

It appears that step 5 is missing the "multiply by 5".