Textbook page 70. Question #18
18. One ninth of the height of an iceberg was above the surface of the water. The iceberg extended to a depth of 75.8 m below the surface. What was the height of the iceberg above the surface? Express your answer to the nearest tenth of a metre.
75.8 is 8 of the iceberg, so we have to find 1 of the iceberg that's above the water.
Divide 75.8 by 8. Whatever the answer is, that is the rest of the iceberg. This is because we don't know what the 1 is but if we divide we get 1 of the iceberg and that is how much is missing.
Now you know that 9.475 is the 1 so now you have to round it to the nearest tenth. That would 9.5.