(a)
45÷5×100%
=9×100%
=900%
(b)
(45-5)÷45×100%
≈0.889×100%
=88.9%
(c)红色绳子有
200-45-5=150(条)
白色绳子是红色绳子的
45÷150×100%
=0.3×100%
=30%
(a)
45÷5×100%
=9×100%
=900%
(b)
(45-5)÷45×100%
≈0.889×100%
=88.9%
(c)红色绳子有
200-45-5=150(条)
白色绳子是红色绳子的
45÷150×100%
=0.3×100%
=30%