Verified answer

[tex]a = 3 \: \: \: \: \: b = 10 \: \: \: \: \: c = 0.1 \\ 100 a + 11.7 \div b - 8 \div c = \\ = 100 \times 3 + 11.7 \div 10 - 8 \div 0.1 = \\ = 300 + 1.17 - 80 = 220 + 1.17 = 221.17[/tex]