-38.6% is the change from 557 to 342
Calculation steps:
[( 342 - 557 ) ÷ 557] x 100 = -38.6%
Formula
Percentage change = [(342 - 557) / 557] x 100
Subtract the new number by the original number
342 - 557 = -215
-215 ÷ 557 = -0.3859964093357271
-0.3859964093357271 x 100 = -38.6%