-66.4% is the change from 506 to 170
Calculation steps:
[( 170 - 506 ) ÷ 506] x 100 = -66.4%
Formula
Percentage change = [(170 - 506) / 506] x 100
Subtract the new number by the original number
170 - 506 = -336
-336 ÷ 506 = -0.6640316205533597
-0.6640316205533597 x 100 = -66.4%