-4.2% is the change from 690 to 661
Calculation steps:
[( 661 - 690 ) ÷ 690] x 100 = -4.2%
Formula
Percentage change = [(661 - 690) / 690] x 100
Subtract the new number by the original number
661 - 690 = -29
-29 ÷ 690 = -0.042028985507246375
-0.042028985507246375 x 100 = -4.2%