-29.2% is the change from 548 to 388
Calculation steps:
[( 388 - 548 ) ÷ 548] x 100 = -29.2%
Formula
Percentage change = [(388 - 548) / 548] x 100
Subtract the new number by the original number
388 - 548 = -160
-160 ÷ 548 = -0.291970802919708
-0.291970802919708 x 100 = -29.2%