-65.45% is the change from 990 to 342
Calculation steps:
[( 342 - 990 ) ÷ 990] x 100 = -65.45%
Formula
Percentage change = [(342 - 990) / 990] x 100
Subtract the new number by the original number
342 - 990 = -648
-648 ÷ 990 = -0.6545454545454545
-0.6545454545454545 x 100 = -65.45%