-44.5% is the change from 919 to 510
Calculation steps:
[( 510 - 919 ) ÷ 919] x 100 = -44.5%
Formula
Percentage change = [(510 - 919) / 919] x 100
Subtract the new number by the original number
510 - 919 = -409
-409 ÷ 919 = -0.44504896626768226
-0.44504896626768226 x 100 = -44.5%