-87% is the change from 400 to 52
Calculation steps:
[( 52 - 400 ) ÷ 400] x 100 = -87%
Formula
Percentage change = [(52 - 400) / 400] x 100
Subtract the new number by the original number
52 - 400 = -348
-348 ÷ 400 = -0.87
-0.87 x 100 = -87%
Example