-64.11% is the change from 521 to 187
Calculation steps:
[( 187 - 521 ) ÷ 521] x 100 = -64.11%
Formula
Percentage change = [(187 - 521) / 521] x 100
Subtract the new number by the original number
187 - 521 = -334
-334 ÷ 521 = -0.6410748560460653
-0.6410748560460653 x 100 = -64.11%