Dividing Mixed numbers

Question

A candle burns for 3 2/15 hours. Estimate the number of candles you would need to give light for 24 hours.

Answer 1

A candle burns for 3 2/15 hours

 

3 2/15 = 47/15

 

so 1 candle burn for 47/15 hour

 

so for 24 hour 

 

24 ÷ 47/15

 

=24 * 15/47

 

=7.65≈8

 

so approximately 8 candles required for 24 hours 

 

Answer 2

24/1 ÷ 3 2/15

24/1 ÷ 32/15          convert to improper fraction

24/1 · 15/32           divide by fraction, multiply by inverse

 

Can you reduce and multiply?