-28.66% is the change from 307 to 219
Calculation steps:
[( 219 - 307 ) ÷ 307] x 100 = -28.66%
Formula
Percentage change = [(219 - 307) / 307] x 100
Subtract the new number by the original number
219 - 307 = -88
-88 ÷ 307 = -0.28664495114006516
-0.28664495114006516 x 100 = -28.66%