Question

Decrease the following quantities by $10\%:$

$3\mathrm{hours}$

Answer 1

Concept used : First find $10\%$ of $3$ then subtract it from $3$

Step 1: Find $10\%$ of $3$

$10\%$ of $3$

$$\begin{gathered} =\frac{10}{100}\times 3 \\ =\frac{3}{10} \\ =0.3 \end{gathered}$$

Step 2: Subtract $0.3$ from $3$

$$\begin{gathered} 3-0.3 \\ =2.7 \end{gathered}$$

Hence, $2.7$ hours is the required answer after reducing $3$ hours by $10\%$.