Data inconsistencies often stem from mixing different reporting periods or currency formats. Start by checking your source timestamps and ensuring all figures use the same base currency. I've seen analysts spend hours chasing phantom discrepancies that turned out to be simple formatting issues.
Your calculation errors usually hide in formula references. Excel's tendency to shift cell references when copying formulas catches even experienced analysts off guard. Double-check that your percentage calculations use absolute references where needed, and verify that your growth rate formulas aren't accidentally including header rows.
When facing interpretation challenges, step back and consider the business context. A 15% quarterly increase might seem positive until you realize it's a seasonal business that typically sees 40% growth during that period. Context transforms numbers from meaningless figures into actionable insights.
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