-90.96% is the change from 564 to 51
Calculation steps:
[( 51 - 564 ) ÷ 564] x 100 = -90.96%
Formula
Percentage change = [(51 - 564) / 564] x 100
Subtract the new number by the original number
51 - 564 = -513
-513 ÷ 564 = -0.9095744680851063
-0.9095744680851063 x 100 = -90.96%