en_tn_condensed/rev/08/07.md

It was thrown down onto the earth

This can be stated in active form. Alternate translation: "The angel threw the hail and fire mixed with blood down onto the earth" (See: rc://en/ta/man/translate/figs-activepassive)

a third of it was burned up, a third of the trees were burned up, and all the green grass was burned up

This can be stated in active form. Alternate translation: "it burned up a third of the earth, a third of the trees, and all the green grass" (See: rc://en/ta/man/translate/figs-activepassive)

a third

"A third" is a fraction. (See: rc://en/ta/man/translate/translate-fraction)