At-home medical test kits have increased in popularity in recent years. This year, 340 million test kits are expected to be sold. This represents a \( 114 \% \) increase from the number of kits that were sold last year. How many medical test kits were sold last year? million test kits (Round to the nearest million.)

To find out how many medical test kits were sold last year, we can set up the equation based on the information given. If \( x \) represents the number of test kits sold last year, we know that \( x \) increased by \( 114 \% \) to equal 340 million. This means we can express it as: \[ x + 1.14x = 340 \] Combining like terms, we get: \[ 2.14x = 340 \] To solve for \( x \), divide both sides by \( 2.14 \): \[ x = \frac{340}{2.14} \approx 158.41 \] Rounding to the nearest million, the number of medical test kits sold last year was approximately **158 million test kits**.