Question 1016442
A couple of ways to do this...here's one...
500 / 20 = 25 kg/lion feeds it for 7 days
200 / 14 = 14.286 kg/lion
Now set up a proportion
{{{25/7 = 14.286/x}}}
Cross-multiply and solve and get
25x = 100
x = 4 days
Another way would be to consider that 500 kg feeds 20*7 = 140 lion/days and go from there...