Converting a/40 and b/80, etc... to Decimals

Converting fractions with denominators like 40 or 80 can be simplified by breaking down the process.

For a fraction $\frac{a}{40}$, treat it as $\frac{a/4}{10}$. First, divide the numerator by 4, then shift the decimal point one place to the left.

Example: $\frac{43}{40} = 1 + \frac{3}{40}$. For the fractional part, calculate $3 \div 4 = 0.75$. Shift the decimal: 0.075. So, $\frac{43}{40} = 1.075$.

Similarly, for $\frac{b}{80}$, treat it as $\frac{b/8}{10}$. Divide the numerator by 8, then shift the decimal.

Example: $\frac{27}{80}$. Calculate $27 \div 8 = 3.375$. Shift the decimal: 0.3375.