GMATIntegrated Reasoning

If a chart shows sales of 200, 250, 300, 400 over Q1-Q4, the percentage increase from Q1 to Q4 is:

A50%
B100%CORRECT
C150%
D200%
AI
Toaster Teacher
Why the answer is B, and why the others tempt you.
(400 − 200) ÷ 200 × 100% = 100%.
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