-63.41% is the change from 511 to 187
Calculation steps:
[( 187 - 511 ) ÷ 511] x 100 = -63.41%
Formula
Percentage change = [(187 - 511) / 511] x 100
Subtract the new number by the original number
187 - 511 = -324
-324 ÷ 511 = -0.6340508806262231
-0.6340508806262231 x 100 = -63.41%