RULE to solve this QUESTION, as per the order is given below:Step-1: Parts of an equation enclosed in 'Brackets' must be solved first and in the BRACKET,Step-2: Any mathematical 'Of' or 'Exponent' must be solved next,Step-3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,Step-4: LAST but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.(1/7.01 + 1/13.99 + 1/27.99) × 100.04 = ?⇒ (1/7 + 1/14 + 1/28) × 100 = x⇒ (4 + 2 + 1)/28 × 100 = x⇒ 7/28 × 100 = x⇒ 1/4 × 100 = x∴ x = 25