-70.58% is the change from 503 to 148
Calculation steps:
[( 148 - 503 ) ÷ 503] x 100 = -70.58%
Formula
Percentage change = [(148 - 503) / 503] x 100
Subtract the new number by the original number
148 - 503 = -355
-355 ÷ 503 = -0.705765407554672
-0.705765407554672 x 100 = -70.58%