-70.18% is the change from 503 to 150
Calculation steps:
[( 150 - 503 ) ÷ 503] x 100 = -70.18%
Formula
Percentage change = [(150 - 503) / 503] x 100
Subtract the new number by the original number
150 - 503 = -353
-353 ÷ 503 = -0.7017892644135189
-0.7017892644135189 x 100 = -70.18%