Answer:
48 years.
Step-by-step explanation:
The Permian Period lasted from 299 Ma to 251 Ma. This means that the Permian Period lasted 48 years.
The Permian Period lasted from 299 to 251. Note that both are Ma, which means that you can just subtract 299 with 251:
299 - 251 = 48
The Permian Period lasted for 48 years.
~
5.2m questions
6.8m answers