-66.45% is the change from 915 to 307
Calculation steps:
[( 307 - 915 ) ÷ 915] x 100 = -66.45%
Formula
Percentage change = [(307 - 915) / 915] x 100
Subtract the new number by the original number
307 - 915 = -608
-608 ÷ 915 = -0.6644808743169399
-0.6644808743169399 x 100 = -66.45%