第1个回答 2019-07-16
1.
40%
of
the
students
in
a
school
are
boys.lf
there
are
240
boys,
how
many
student
are
therein
the
school?
2.
a
boy
has
finished
reading
160pages
of
a
story
book
and
he
finds
that
is
20%
of
the
book
left.how
many
pages
are
there
in
the
book?
3.
Among
the
800
people,
70%
like
swimming.How
many
people
like
swimming?
1、学校40%的学生是男孩，如果这里有240个男孩，那么学校有多少学生？
240/40%=600
2、一个男孩看完了160页故事书，他发现还有20%没看，问这本故事书多少页？
160/（1-20%0）=200
3、800人中，70%的人喜欢游泳，请问有多少人喜欢游泳？
800*70%=560