66.98% is the change from 321 to 536
Calculation steps:
[( 536 - 321 ) ÷ 321] x 100 = 66.98%
Formula
Percentage change = [(536 - 321) / 321] x 100
Subtract the new number by the original number
536 - 321 = 215
215 ÷ 321 = 0.6697819314641744
0.6697819314641744 x 100 = 66.98%