-58.9% is the change from 657 to 270
Calculation steps:
[( 270 - 657 ) ÷ 657] x 100 = -58.9%
Formula
Percentage change = [(270 - 657) / 657] x 100
Subtract the new number by the original number
270 - 657 = -387
-387 ÷ 657 = -0.589041095890411
-0.589041095890411 x 100 = -58.9%