-21.47% is the change from 177 to 139
Calculation steps:
[( 139 - 177 ) ÷ 177] x 100 = -21.47%
Formula
Percentage change = [(139 - 177) / 177] x 100
Subtract the new number by the original number
139 - 177 = -38
-38 ÷ 177 = -0.21468926553672316
-0.21468926553672316 x 100 = -21.47%