-59.58% is the change from 668 to 270
Calculation steps:
[( 270 - 668 ) ÷ 668] x 100 = -59.58%
Formula
Percentage change = [(270 - 668) / 668] x 100
Subtract the new number by the original number
270 - 668 = -398
-398 ÷ 668 = -0.5958083832335329
-0.5958083832335329 x 100 = -59.58%