The grasshopper, the frog and the mouse had a jumping contest. The grasshopper jumped 28 inches. The frog jumped 40 inches farther than the grasshopper and the mouse jumped 38 inches farther than the frog. How far did the frog jump?
The grasshopper jumped 28 inches. 
The frog jumped 40 inches farther than the grasshopper. 
The mouse jumped 38 inches farther than the frog. 

So, we can say that the frog jumped 40 + 38 = 78 inches.