-31.5% is the change from 508 to 348
Calculation steps:
[( 348 - 508 ) ÷ 508] x 100 = -31.5%
Formula
Percentage change = [(348 - 508) / 508] x 100
Subtract the new number by the original number
348 - 508 = -160
-160 ÷ 508 = -0.31496062992125984
-0.31496062992125984 x 100 = -31.5%