# math

posted by
**Kay**
.

If you earn the grades of 81, 84, 78, 80 in four tests what should your final testâ€™s score be in order to have an average of 81%?

.81x400=324

Need a total of 324 pts

Test grades so far 81,84,78,80 = 323

324-323=1

You need at least one more point to get an 81

Can someone please check my problem to see if it is correct if not please guide me thank you