-52.73% is the change from 660 to 312
Calculation steps:
[( 312 - 660 ) ÷ 660] x 100 = -52.73%
Formula
Percentage change = [(312 - 660) / 660] x 100
Subtract the new number by the original number
312 - 660 = -348
-348 ÷ 660 = -0.5272727272727272
-0.5272727272727272 x 100 = -52.73%