18 --- 60%
х --- 100%
60х = 18×100
60х = 1800
х=1800÷ 60
х=30
18:60×100=30 (учеников)
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18 --- 60%
х --- 100%
60х = 18×100
60х = 1800
х=1800÷ 60
х=30
18:60×100=30 (учеников)