January 2026 Problem of the Month

This month's problem is a challenge from President Donald Trump.

"We’re bringing down drug prices by 1000%, 1200%, 1300%, 1400%," Trump said on Monday, December 21, 2025.   "A drug that sells for $10 in London is costing $130 in New York.   We are bringing it down to $20. You can do your own math.   But it’s 2000%, 3000%."

So, the problem for this month is to do your own math and determine the correct percent decrease from $130 to $20.   Please send in the percent correct to one decimal place.

Click here for an article about President Trump's comments on December 21, 2025