-58.7% is the change from 661 to 273
Calculation steps:
[( 273 - 661 ) ÷ 661] x 100 = -58.7%
Formula
Percentage change = [(273 - 661) / 661] x 100
Subtract the new number by the original number
273 - 661 = -388
-388 ÷ 661 = -0.5869894099848714
-0.5869894099848714 x 100 = -58.7%