School grade?

I am getting 60% in Chem for 1 test & 1 homework. Then I got 80 percent on 2 homework and my grade is now 59%. Isnt my grade suppose to go higher? or:

I am getting 60% in Chem for 1 test & 1 homework. Then I got 80 percent on 2 homework and my grade is now 59%. Isn't my grade suppose to go higher?

or:I am getting 60% in Chem for 1 test & 1 homework. Then I got 80 percent on 2 homework and my grade is now 59%. Isn't my grade suppose to go higher?

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