-50.99% is the change from 557 to 273
Calculation steps:
[( 273 - 557 ) ÷ 557] x 100 = -50.99%
Formula
Percentage change = [(273 - 557) / 557] x 100
Subtract the new number by the original number
273 - 557 = -284
-284 ÷ 557 = -0.5098743267504489
-0.5098743267504489 x 100 = -50.99%