-78.09% is the change from 397 to 87
Calculation steps:
[( 87 - 397 ) ÷ 397] x 100 = -78.09%
Formula
Percentage change = [(87 - 397) / 397] x 100
Subtract the new number by the original number
87 - 397 = -310
-310 ÷ 397 = -0.7808564231738035
-0.7808564231738035 x 100 = -78.09%