Kelly invested $1,500 in the stock market on january 1st. she lost 1/3 of it by the end of january and 2/5 of the remaining amount by the end of february. how much did she have left?

By the end of January, Kelly lost (1/3) of 1500 = $500

at the beginning of February, Kelly has 1500- 500 = $1000 left

Then in mid-February, she lost another (2/5) of 1000 = $400

Kelly has 1000 - 400 = $600 left 

Aperecent is the answer