-17.67% is the change from 215 to 177
Calculation steps:
[( 177 - 215 ) ÷ 215] x 100 = -17.67%
Formula
Percentage change = [(177 - 215) / 215] x 100
Subtract the new number by the original number
177 - 215 = -38
-38 ÷ 215 = -0.17674418604651163
-0.17674418604651163 x 100 = -17.67%