1)5% 1)5×100:100=5%
2)20% 2)6×100:30=20%
3)15% 3)4,5×100:30=15%
4)40% 4)2,8×100:7=40%
5)20% 5)1,2×100:6=20%
6)40% 6)9,6×100:24=40%
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1)5% 1)5×100:100=5%
2)20% 2)6×100:30=20%
3)15% 3)4,5×100:30=15%
4)40% 4)2,8×100:7=40%
5)20% 5)1,2×100:6=20%
6)40% 6)9,6×100:24=40%