-70.92% is the change from 306 to 89
Calculation steps:
[( 89 - 306 ) ÷ 306] x 100 = -70.92%
Formula
Percentage change = [(89 - 306) / 306] x 100
Subtract the new number by the original number
89 - 306 = -217
-217 ÷ 306 = -0.7091503267973857
-0.7091503267973857 x 100 = -70.92%