-54.12% is the change from 667 to 306
Calculation steps:
[( 306 - 667 ) ÷ 667] x 100 = -54.12%
Formula
Percentage change = [(306 - 667) / 667] x 100
Subtract the new number by the original number
306 - 667 = -361
-361 ÷ 667 = -0.5412293853073463
-0.5412293853073463 x 100 = -54.12%