-74.56% is the change from 342 to 87
Calculation steps:
[( 87 - 342 ) ÷ 342] x 100 = -74.56%
Formula
Percentage change = [(87 - 342) / 342] x 100
Subtract the new number by the original number
87 - 342 = -255
-255 ÷ 342 = -0.7456140350877193
-0.7456140350877193 x 100 = -74.56%