-67.2% is the change from 945 to 310
Calculation steps:
[( 310 - 945 ) ÷ 945] x 100 = -67.2%
Formula
Percentage change = [(310 - 945) / 945] x 100
Subtract the new number by the original number
310 - 945 = -635
-635 ÷ 945 = -0.671957671957672
-0.671957671957672 x 100 = -67.2%