-59.46% is the change from 666 to 270
Calculation steps:
[( 270 - 666 ) ÷ 666] x 100 = -59.46%
Formula
Percentage change = [(270 - 666) / 666] x 100
Subtract the new number by the original number
270 - 666 = -396
-396 ÷ 666 = -0.5945945945945946
-0.5945945945945946 x 100 = -59.46%