Answer:
22%
Step-by-step explanation:
1000-780=220
220/1000=0.22, or 22%
X=80, y=140,z=20
I hope it helps
The candle would burn for 18 hours.
45 / 15 = 3
If the candle is three times longer than normal, it will burn three times longer than normal.
3 x 6 = 18