-64.87% is the change from 612 to 215
Calculation steps:
[( 215 - 612 ) ÷ 612] x 100 = -64.87%
Formula
Percentage change = [(215 - 612) / 612] x 100
Subtract the new number by the original number
215 - 612 = -397
-397 ÷ 612 = -0.6486928104575164
-0.6486928104575164 x 100 = -64.87%