-63% is the change from 919 to 340
Calculation steps:
[( 340 - 919 ) ÷ 919] x 100 = -63%
Formula
Percentage change = [(340 - 919) / 919] x 100
Subtract the new number by the original number
340 - 919 = -579
-579 ÷ 919 = -0.6300326441784548
-0.6300326441784548 x 100 = -63%