-4.5% is the change from 222 to 212
Calculation steps:
[( 212 - 222 ) ÷ 222] x 100 = -4.5%
Formula
Percentage change = [(212 - 222) / 222] x 100
Subtract the new number by the original number
212 - 222 = -10
-10 ÷ 222 = -0.04504504504504504
-0.04504504504504504 x 100 = -4.5%