8100% is the change from 4 to 328
Calculation steps:
[( 328 - 4 ) ÷ 4] x 100 = 8100%
Formula
Percentage change = [(328 - 4) / 4] x 100
Subtract the new number by the original number
328 - 4 = 324
324 ÷ 4 = 81
81 x 100 = 8100%
Example