1200% is the change from 50 to 650
Calculation steps:
[( 650 - 50 ) ÷ 50] x 100 = 1200%
Formula
Percentage change = [(650 - 50) / 50] x 100
Subtract the new number by the original number
650 - 50 = 600
600 ÷ 50 = 12
12 x 100 = 1200%
Example