-67.95% is the change from 521 to 167
Calculation steps:
[( 167 - 521 ) ÷ 521] x 100 = -67.95%
Formula
Percentage change = [(167 - 521) / 521] x 100
Subtract the new number by the original number
167 - 521 = -354
-354 ÷ 521 = -0.6794625719769674
-0.6794625719769674 x 100 = -67.95%