SAT Percentages: The Fast Way
Percent change, percent of, and reverse-percent questions on the Digital SAT — all solved with one consistent formula.
The One Formula You Need
Percent = (part / whole) × 100. Every SAT percent question can be rewritten to fit this, then rearranged algebraically.
Percent Change
Percent change = ((new − old) / old) × 100. Always divide by the original number, not the final one — mixing these up is the most common SAT percent mistake.
Related Posts
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- SAT Statistics: Mean, Median, and Mode Explained
Mean, median, mode, range, and standard deviation on the Digital SAT — with the intuition that makes them click.
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