180.7% is the change from 228 to 640
Calculation steps:
[( 640 - 228 ) ÷ 228] x 100 = 180.7%
Formula
Percentage change = [(640 - 228) / 228] x 100
Subtract the new number by the original number
640 - 228 = 412
412 ÷ 228 = 1.8070175438596492
1.8070175438596492 x 100 = 180.7%