-50.65% is the change from 612 to 302
Calculation steps:
[( 302 - 612 ) ÷ 612] x 100 = -50.65%
Formula
Percentage change = [(302 - 612) / 612] x 100
Subtract the new number by the original number
302 - 612 = -310
-310 ÷ 612 = -0.5065359477124183
-0.5065359477124183 x 100 = -50.65%