-29.1% is the change from 945 to 670
Calculation steps:
[( 670 - 945 ) ÷ 945] x 100 = -29.1%
Formula
Percentage change = [(670 - 945) / 945] x 100
Subtract the new number by the original number
670 - 945 = -275
-275 ÷ 945 = -0.291005291005291
-0.291005291005291 x 100 = -29.1%