-54.62% is the change from 390 to 177
Calculation steps:
[( 177 - 390 ) ÷ 390] x 100 = -54.62%
Formula
Percentage change = [(177 - 390) / 390] x 100
Subtract the new number by the original number
177 - 390 = -213
-213 ÷ 390 = -0.5461538461538461
-0.5461538461538461 x 100 = -54.62%