Each horse eats 25 lb of feed
In one day the four horses eat
25 x 4= 100 lb of feed
In 50 days the horses will eat
100 x 50=5000 lb
we need to transform the lb into tons
1 ton = 2000 lb
x ton = 5000
x is the number of tons in 500 lb, x can be calculated if we divide 5000 between 2000
In 50 days the horses eat 2.5 tons or 5/2 tons or 2 1/2 tons