-30.63% is the change from 751 to 521
Calculation steps:
[( 521 - 751 ) ÷ 751] x 100 = -30.63%
Formula
Percentage change = [(521 - 751) / 751] x 100
Subtract the new number by the original number
521 - 751 = -230
-230 ÷ 751 = -0.3062583222370173
-0.3062583222370173 x 100 = -30.63%