7900% is the change from 4 to 320
Calculation steps:
[( 320 - 4 ) ÷ 4] x 100 = 7900%
Formula
Percentage change = [(320 - 4) / 4] x 100
Subtract the new number by the original number
320 - 4 = 316
316 ÷ 4 = 79
79 x 100 = 7900%
Example