70.8% is the change from 387 to 661
Calculation steps:
[( 661 - 387 ) ÷ 387] x 100 = 70.8%
Formula
Percentage change = [(661 - 387) / 387] x 100
Subtract the new number by the original number
661 - 387 = 274
274 ÷ 387 = 0.7080103359173127
0.7080103359173127 x 100 = 70.8%