90% is the change from 200 to 380
Calculation steps:
[( 380 - 200 ) ÷ 200] x 100 = 90%
Formula
Percentage change = [(380 - 200) / 200] x 100
Subtract the new number by the original number
380 - 200 = 180
180 ÷ 200 = 0.9
0.9 x 100 = 90%
Example