how 0.2/240 = 0.0083333333 ? in your calculator
$$0.2 \div 240$$
$${\frac{{\mathtt{0.2}}}{{\mathtt{240}}}} = {\frac{{\mathtt{1}}}{{\mathtt{1\,200}}}} = {\mathtt{0.000\: \!833\: \!333\: \!333\: \!333\: \!3}}$$