-75.36% is the change from 349 to 86
Calculation steps:
[( 86 - 349 ) ÷ 349] x 100 = -75.36%
Formula
Percentage change = [(86 - 349) / 349] x 100
Subtract the new number by the original number
86 - 349 = -263
-263 ÷ 349 = -0.7535816618911175
-0.7535816618911175 x 100 = -75.36%