-76.42% is the change from 615 to 145
Calculation steps:
[( 145 - 615 ) ÷ 615] x 100 = -76.42%
Formula
Percentage change = [(145 - 615) / 615] x 100
Subtract the new number by the original number
145 - 615 = -470
-470 ÷ 615 = -0.7642276422764228
-0.7642276422764228 x 100 = -76.42%