-78.47% is the change from 339 to 73
Calculation steps:
[( 73 - 339 ) ÷ 339] x 100 = -78.47%
Formula
Percentage change = [(73 - 339) / 339] x 100
Subtract the new number by the original number
73 - 339 = -266
-266 ÷ 339 = -0.7846607669616519
-0.7846607669616519 x 100 = -78.47%