-81.23% is the change from 341 to 64
Calculation steps:
[( 64 - 341 ) ÷ 341] x 100 = -81.23%
Formula
Percentage change = [(64 - 341) / 341] x 100
Subtract the new number by the original number
64 - 341 = -277
-277 ÷ 341 = -0.8123167155425219
-0.8123167155425219 x 100 = -81.23%