-53.36% is the change from 669 to 312
Calculation steps:
[( 312 - 669 ) ÷ 669] x 100 = -53.36%
Formula
Percentage change = [(312 - 669) / 669] x 100
Subtract the new number by the original number
312 - 669 = -357
-357 ÷ 669 = -0.5336322869955157
-0.5336322869955157 x 100 = -53.36%