-62.14% is the change from 309 to 117
Calculation steps:
[( 117 - 309 ) ÷ 309] x 100 = -62.14%
Formula
Percentage change = [(117 - 309) / 309] x 100
Subtract the new number by the original number
117 - 309 = -192
-192 ÷ 309 = -0.6213592233009708
-0.6213592233009708 x 100 = -62.14%