GRE Sample Test 4 Quantitative Reasoning 2

The question asks for the number that is 850% greater than 8 × ${10}^3$. First, determine the value of 8 × ${10}^3$. That number is 8,000. To 8,000, you need to add 850% of 8,000. Here’s what the math looks like:
8,000 + (850% × 8,000) = 8,000 + (8.5 × 8,000) = 8,000 + 68,000 = 76,000 In scientific notation, this is 7.6 × ${10}^4$, choice (D).