What part of Earth's volume does the mantle make up?

83 crore is the correct answer.

83 is core, the mantel is 16 and the volume of the earth is crust.

It's 84% exactly

why am i wrong?

Although the core and mantle are about equal in thickness, the core actually forms only15 percentof the Earth's volume, whereas the mantle occupies84 percent. The crust makes up the remaining1 percent.