About 88 percent of earth’s history is within the expanse of time before the phanerozoic era, which is called the

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The proper answer to this question is "Precambrian".

Reason:

The Precambrian is the expanse of time before the Phanerozoic era. Also largest span of time in Earth's history before the current Phanerozoic Eon. The Precambrian divided into several eons of the geologic time scale. Which means that its the history of the eras.

Therefore the answer is Precambrian.

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Hope this helps!

~Nonportrit