-21.5% is the change from 307 to 241
Calculation steps:
[( 241 - 307 ) ÷ 307] x 100 = -21.5%
Formula
Percentage change = [(241 - 307) / 307] x 100
Subtract the new number by the original number
241 - 307 = -66
-66 ÷ 307 = -0.21498371335504887
-0.21498371335504887 x 100 = -21.5%