-89.86% is the change from 207 to 21
Calculation steps:
[( 21 - 207 ) ÷ 207] x 100 = -89.86%
Formula
Percentage change = [(21 - 207) / 207] x 100
Subtract the new number by the original number
21 - 207 = -186
-186 ÷ 207 = -0.8985507246376812
-0.8985507246376812 x 100 = -89.86%