-53.1% is the change from 548 to 257
Calculation steps:
[( 257 - 548 ) ÷ 548] x 100 = -53.1%
Formula
Percentage change = [(257 - 548) / 548] x 100
Subtract the new number by the original number
257 - 548 = -291
-291 ÷ 548 = -0.531021897810219
-0.531021897810219 x 100 = -53.1%