Alyssa and Chelsea jointly bought 40 candles to decorate their room. Alyssa used half of them, and Chelsea used 70% of the remaining candles. How many candles are there in the room now?
Alyssa used half of the candles, which is 1/2*40 = <<1/2*40=20>>20 candles
The number of candles that remained is 40-20 = <<40-20=20>>20
Chelsea used 70% of the remaining candles, a total of 70/100*20 = <<70/100*20=14>>14 candles.
The total number of candles in the room now is 40 - 20-14 = <<40-20-14=6>>6
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