04/23/2026
The SAT is May 2nd. Percent problems show up every test and most students get them wrong for the same reason — they try to do the math in their heads instead of using a system.
The system: pick 100. No starting number in the problem? Use 100. Percent means out of 100, so it makes every step simple arithmetic.
This carousel walks through four problem types you'll see on test day:
→ Percent change (and the trap answer the SAT sets for you)
→ Stacked discounts (why you can't just add the percents)
→ Up-then-down (why 20% up then 20% down isn't a wash)
→ Chained percents (the "a is X% greater than b" format)
Each one uses the same shortcut. Each one takes under a minute.
Comment PERCENT and I'll DM you my percentages guide with more practice problems and shortcuts.