Cach 1 : 25% cua 150.000 la: 37500
so tien de ban hop banh duoc lai 25% gia von la:
150000 + 37500 = 187500 ( dong )
Cach 2 de duoc lai 25% thi so phan tram gi banh can ban la: 100% + 25% =125%
Vay de ban hop banh duoc lai 25% thi can ban hop banh voi gia : 150000 / 100 *125 =187500
vay can ban hop banh 187500 dong de duoc lai 25%.