-13.36% is the change from 217 to 188
Calculation steps:
[( 188 - 217 ) ÷ 217] x 100 = -13.36%
Formula
Percentage change = [(188 - 217) / 217] x 100
Subtract the new number by the original number
188 - 217 = -29
-29 ÷ 217 = -0.1336405529953917
-0.1336405529953917 x 100 = -13.36%