-81.8% is the change from 813 to 148
Calculation steps:
[( 148 - 813 ) ÷ 813] x 100 = -81.8%
Formula
Percentage change = [(148 - 813) / 813] x 100
Subtract the new number by the original number
148 - 813 = -665
-665 ÷ 813 = -0.8179581795817958
-0.8179581795817958 x 100 = -81.8%