-50.43% is the change from 690 to 342
Calculation steps:
[( 342 - 690 ) ÷ 690] x 100 = -50.43%
Formula
Percentage change = [(342 - 690) / 690] x 100
Subtract the new number by the original number
342 - 690 = -348
-348 ÷ 690 = -0.5043478260869565
-0.5043478260869565 x 100 = -50.43%