-66.42% is the change from 938 to 315
Calculation steps:
[( 315 - 938 ) ÷ 938] x 100 = -66.42%
Formula
Percentage change = [(315 - 938) / 938] x 100
Subtract the new number by the original number
315 - 938 = -623
-623 ÷ 938 = -0.664179104477612
-0.664179104477612 x 100 = -66.42%