66.4% is the change from 253 to 421
Calculation steps:
[( 421 - 253 ) ÷ 253] x 100 = 66.4%
Formula
Percentage change = [(421 - 253) / 253] x 100
Subtract the new number by the original number
421 - 253 = 168
168 ÷ 253 = 0.6640316205533597
0.6640316205533597 x 100 = 66.4%