-59.64% is the change from 669 to 270
Calculation steps:
[( 270 - 669 ) ÷ 669] x 100 = -59.64%
Formula
Percentage change = [(270 - 669) / 669] x 100
Subtract the new number by the original number
270 - 669 = -399
-399 ÷ 669 = -0.5964125560538116
-0.5964125560538116 x 100 = -59.64%