[tex]a) \: 10 \div 100 = 0.1 \\ 450 \times 0.1 = 45 \\ \\ b) \: 20 \div 100 = 0.2 \\450\times 0.2 = 90 \\ \\ c) \: 15 \div 100 = 0.15 \\ 450 \times 0.15 = 67.5 \\ \\d) \: 5 \div 100 = 0.05 \\ 450 \times 0.05 = 22.5[/tex]
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[tex]a) \: 10 \div 100 = 0.1 \\ 450 \times 0.1 = 45 \\ \\ b) \: 20 \div 100 = 0.2 \\450\times 0.2 = 90 \\ \\ c) \: 15 \div 100 = 0.15 \\ 450 \times 0.15 = 67.5 \\ \\d) \: 5 \div 100 = 0.05 \\ 450 \times 0.05 = 22.5[/tex]
Espero ter ajudado!