Wai and kuri were digging in the sand at the beach. was dug a hole that was 15 inches below the surface and kuri dug a hole that was 9 inches below the surface. find the difference in the depths of their holes.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest