Follow BODMAS rule to solve this question, as per the order given below, Step-1- Parts of an equation enclosed in 'Brackets' must be solved first, and in the bracket, the BODMAS rule must be followed, 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. ⇒ 7 ÷ 2 – [3 of 7 ÷ 4 ÷ {(2 ÷ 5) × (25 ÷ 8) ÷ (5 ÷ 2)}] ⇒ 7 ÷ 2 – [3 of 7 ÷ 4 ÷ {(2/5) × (25/8) ÷ (5/2)}] ⇒ 7 ÷ 2 – [3 of 7 ÷ 4 ÷ {(2/5) × (5/4)}] ⇒ 7 ÷ 2 – [3 of 7 ÷ 4 ÷ (1/2)] ⇒ 7 ÷ 2 – [21 ÷ 4 ÷ (1/2)] ⇒ 7 ÷ 2 - [21 ÷ 4 × 2] ⇒ 7/2 – 21/2 ⇒ -14/2 = -7