-10.3% is the change from 670 to 601
Calculation steps:
[( 601 - 670 ) ÷ 670] x 100 = -10.3%
Formula
Percentage change = [(601 - 670) / 670] x 100
Subtract the new number by the original number
601 - 670 = -69
-69 ÷ 670 = -0.10298507462686567
-0.10298507462686567 x 100 = -10.3%