20÷（20+100），
=20÷120，
≈16.7%；
答：盐占盐水的16.7%．
故选：B．
把20克盐溶解在100克水中，盐占盐水的（ ） A.20% B.16.7% C.25% D.30%
把20克盐溶解在100克水中，盐占盐水的（ ）
A. 20%
B. 16.7%
C. 25%
D. 30%
A. 20%
B. 16.7%
C. 25%
D. 30%
数学人气：764 ℃时间：2019-11-12 08:08:38
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