-67.31% is the change from 309 to 101
Calculation steps:
[( 101 - 309 ) ÷ 309] x 100 = -67.31%
Formula
Percentage change = [(101 - 309) / 309] x 100
Subtract the new number by the original number
101 - 309 = -208
-208 ÷ 309 = -0.6731391585760518
-0.6731391585760518 x 100 = -67.31%