-34.45% is the change from 987 to 647
Calculation steps:
[( 647 - 987 ) ÷ 987] x 100 = -34.45%
Formula
Percentage change = [(647 - 987) / 987] x 100
Subtract the new number by the original number
647 - 987 = -340
-340 ÷ 987 = -0.3444782168186423
-0.3444782168186423 x 100 = -34.45%