-50.45% is the change from 670 to 332
Calculation steps:
[( 332 - 670 ) ÷ 670] x 100 = -50.45%
Formula
Percentage change = [(332 - 670) / 670] x 100
Subtract the new number by the original number
332 - 670 = -338
-338 ÷ 670 = -0.5044776119402985
-0.5044776119402985 x 100 = -50.45%