1. **State the problem:** Calculate $850 + 150\%$ of $850$. 2. **Formula and explanation:** To add a percentage of a number to the number itself, use the formula: $$\text{Total} = \text{Original number} + \left(\frac{\text{Percentage}}{100} \times \text{Original number}\right)$$ 3. **Calculate 150% of 850:** $$150\% = \frac{150}{100} = 1.5$$ $$1.5 \times 850 = 1275$$ 4. **Add this to the original number:** $$850 + 1275 = 2125$$ 5. **Final answer:** $$2125$$ So, $850 + 150\%$ of $850$ equals $2125$.