-3.95% is the change from 684 to 657
Calculation steps:
[( 657 - 684 ) ÷ 684] x 100 = -3.95%
Formula
Percentage change = [(657 - 684) / 684] x 100
Subtract the new number by the original number
657 - 684 = -27
-27 ÷ 684 = -0.039473684210526314
-0.039473684210526314 x 100 = -3.95%