Solve for a
a=\frac{2}{15}\approx 0.133333333
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3a=1-0.6
Subtract 0.6 from both sides.
3a=0.4
Subtract 0.6 from 1 to get 0.4.
a=\frac{0.4}{3}
Divide both sides by 3.
a=\frac{4}{30}
Expand \frac{0.4}{3} by multiplying both numerator and the denominator by 10.
a=\frac{2}{15}
Reduce the fraction \frac{4}{30} to lowest terms by extracting and canceling out 2.
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