-63.99% is the change from 611 to 220
Calculation steps:
[( 220 - 611 ) ÷ 611] x 100 = -63.99%
Formula
Percentage change = [(220 - 611) / 611] x 100
Subtract the new number by the original number
220 - 611 = -391
-391 ÷ 611 = -0.6399345335515548
-0.6399345335515548 x 100 = -63.99%