-77.7% is the change from 610 to 136
Calculation steps:
[( 136 - 610 ) ÷ 610] x 100 = -77.7%
Formula
Percentage change = [(136 - 610) / 610] x 100
Subtract the new number by the original number
136 - 610 = -474
-474 ÷ 610 = -0.7770491803278688
-0.7770491803278688 x 100 = -77.7%