Here are the steps, following the order of operations (exponent first, then the brackets, division, and subtraction).
- Exponent: 2^10 = 1024
- Brackets: 3.5 + 1024 = 1027.5
- Division: 1027.5 ÷ 7 = 146.785714285...
- Percentage: 15% of 80 = 0.15 × 80 = 12
- Subtraction: 146.785714285... − 12 = 134.785714285...
Rounded to 4 decimal places, the answer is 134.7857.
The same steps work as a quick check if you want to run them in a calculator: the only rounding happens at the end, so carrying the full value of 1027.5 ÷ 7 through the subtraction keeps the last digit correct.
