Solve for A
A=\frac{4}{35}\approx 0.114285714
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A=\frac{0.8}{7}
Divide both sides by 7.
A=\frac{8}{70}
Expand \frac{0.8}{7} by multiplying both numerator and the denominator by 10.
A=\frac{4}{35}
Reduce the fraction \frac{8}{70} to lowest terms by extracting and canceling out 2.
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