-21% is the change from 300 to 237
Calculation steps:
[( 237 - 300 ) ÷ 300] x 100 = -21%
Formula
Percentage change = [(237 - 300) / 300] x 100
Subtract the new number by the original number
237 - 300 = -63
-63 ÷ 300 = -0.21
-0.21 x 100 = -21%
Example