(1)设原价为1,则跳楼价为2.5×1×(1-30%)×(1-30%)×(1-30%)=2.5×0.7 3,
所以跳楼价占原价的百分比为2.5×0.7 3÷1=85.75%;
(2)原价出售:销售金额=100×1=100,
新价出售:销售金额=2.5×1×0.7×10+2.5×0.7×0.7×40+2.5×0.7 3×(100-10-40)
=109.375;
∵109.375>100,
∴新方案销售更盈利.
(1)设原价为1,则跳楼价为2.5×1×(1-30%)×(1-30%)×(1-30%)=2.5×0.7 3,
所以跳楼价占原价的百分比为2.5×0.7 3÷1=85.75%;
(2)原价出售:销售金额=100×1=100,
新价出售:销售金额=2.5×1×0.7×10+2.5×0.7×0.7×40+2.5×0.7 3×(100-10-40)
=109.375;
∵109.375>100,
∴新方案销售更盈利.