-72% is the change from 918 to 257
Calculation steps:
[( 257 - 918 ) ÷ 918] x 100 = -72%
Formula
Percentage change = [(257 - 918) / 918] x 100
Subtract the new number by the original number
257 - 918 = -661
-661 ÷ 918 = -0.7200435729847494
-0.7200435729847494 x 100 = -72%