-84.5% is the change from 342 to 53
Calculation steps:
[( 53 - 342 ) ÷ 342] x 100 = -84.5%
Formula
Percentage change = [(53 - 342) / 342] x 100
Subtract the new number by the original number
53 - 342 = -289
-289 ÷ 342 = -0.8450292397660819
-0.8450292397660819 x 100 = -84.5%