-37.86% is the change from 309 to 192
Calculation steps:
[( 192 - 309 ) ÷ 309] x 100 = -37.86%
Formula
Percentage change = [(192 - 309) / 309] x 100
Subtract the new number by the original number
192 - 309 = -117
-117 ÷ 309 = -0.3786407766990291
-0.3786407766990291 x 100 = -37.86%