The grasshopper, the frog and the mouse had a jumping contest. The grasshopper jumped w inches. The grasshopper jumped x inches farther than the frog and the mouse jumped y inches lesser than the frog. How much farther did the grasshopper jump than the mouse?
The grasshopper jumped w inches. The grasshopper jumped x inches farther than the frog and the mouse jumped y inches lesser than the frog.

This means that the frog jumped (w - x) inches and the mouse jumped (w - y) inches.

Therefore, the grasshopper jumped x + y inches farther than the mouse.