how do i show an increase of 120% for 5 numbers?

a0 = 10

an = a(n-1)*2.2

So a0 = 10

a1 = 22

a2 = 48,4

a3 = 106,48

a4 = 234,256

a5 = 515,3632

and so on.

For every increase (or decrease) , add 1 to the rate and multiply.

Example: 20 increases 10% then 15 % then 7% then 4% then 18%

Result = 20 * ( 1 + .10 ) * ( 1 + .15 ) * ( 1 + .07 ) * ( 1 + .04 ) *( 1 + .18)

......... = 20 * ( 1.10 ) * ( 1.15 ) * ( 1.07 ) * ( 1.04 ) *( 1.18)

......... = 20 * (1.66107656) ← that's a 66 % increase

......... = 33.2215312

Note: If it's a decrease, make the rate a negative

Example: 10% decrease → ( 1 - .10) = .9

To find the % increase (or decrease) after, say 5 increases, simply compute:

100 * (final amount - starting amount )/starting amount and subtract 100.