SOLUTION: erica scored 27 out of 30 problems correct on her last test, At the rate how many problems would she score correctly on a test with 70 problems
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Question 716760: erica scored 27 out of 30 problems correct on her last test, At the rate how many problems would she score correctly on a test with 70 problems Answer by checkley79(3341) (Show Source):
You can put this solution on YOUR website! 27/30=X/70 CROSS MULTIPLY.
30X=27*70
30X=1890
X=1890/30
X=63 QUESTIONS NEED TO BE ANSWERED CORRECTLY.
PROOF:
27/30=63/70
27*70=30*63
1890=1890
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