In Saskatchewan in 1986, there were 1657 beekeepers operating 105 000 colonies. Each colony produced 70 kg of honey. In 2007, the number of beekeepers was reduced to 1048. Assume that the decline in the numbers of beekeepers generates an arithmetic sequence. Determine the change in the number of beekeepers each year from 1986 to 2007.

So, I think you have to solve for d in the equation Tn = T1 + (n-1)d The difference.

1048 = 1657 + (21-1)d

1048 = 1657 + (20)d

1048 = 1677d

This is where I messed up, the answer is suppose to be -29 beekeepers but I get d = .624 which is obviously wrong...