-34.75% is the change from 987 to 644
Calculation steps:
[( 644 - 987 ) ÷ 987] x 100 = -34.75%
Formula
Percentage change = [(644 - 987) / 987] x 100
Subtract the new number by the original number
644 - 987 = -343
-343 ÷ 987 = -0.3475177304964539
-0.3475177304964539 x 100 = -34.75%