-13.59% is the change from 640 to 553
Calculation steps:
[( 553 - 640 ) ÷ 640] x 100 = -13.59%
Formula
Percentage change = [(553 - 640) / 640] x 100
Subtract the new number by the original number
553 - 640 = -87
-87 ÷ 640 = -0.1359375
-0.1359375 x 100 = -13.59%