What is the increasing rate of 8904 and 29209
This question makes no sense.
Rates are change in one unit in relation to change in another unit. Like mile per hour (distance traveled over time taken)
you have given no units at all!
Or do you mean the percentage increase which has similar meaning as 'increasing rate'?
(29209-8904)/8904 x 100%
\(\approx \) 228%