Question
Express the following decimal as a rational number.$21.025$
✓
Answer
$21.025 $
$=\frac{21.025}{1000} $
$ =\frac{21025 \div 25}{1000 \div 25} $
$ =\frac{841}{40}$
$=\frac{21.025}{1000} $
$ =\frac{21025 \div 25}{1000 \div 25} $
$ =\frac{841}{40}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Draw the graph for the equation, given below$ :x = 5$
→Prove that:
$\frac{\cos A}{\sin \left(90^{\circ}-A\right)}+\frac{\sin A}{\cos \left(90^{\circ}-A\right)}=2$.
→$\frac{\cos A}{\sin \left(90^{\circ}-A\right)}+\frac{\sin A}{\cos \left(90^{\circ}-A\right)}=2$.
Express the following in terms of trigonometric ratios of angles between 0 and 45.
$\cos 81+\cot 81$
→$\cos 81+\cot 81$
If $\sin \theta=\frac{1}{\sqrt{2}}$, find the values of other trigonometrical ratios for $\theta$.
→Write three irrational numbers between $\sqrt{2}$ and $\sqrt{7}$.
[Hint. $\sqrt{2}<\sqrt{3}<\sqrt{5}<\sqrt{6}<\sqrt{7}]$
→[Hint. $\sqrt{2}<\sqrt{3}<\sqrt{5}<\sqrt{6}<\sqrt{7}]$
The daily minimum temperature recorded (in degree F) at a place during a week was as under :
Find the mean temperature.
| Monday | Tuesday | Wednesday | Thursday | Friday | Saturday |
| 35.2 | 31.1 | 27.6 | 31,8 | 29.3 | 23.8 |
Solve the following equations$: a(x - b) -x (x - 2b) = x + 5(x - b)$
→If $p^2 + q^2 + r^2 = 82$ and $pq + qr + pr = 18$; find $p + q + r.$
→Calculate the area of the figure given below: which is not drawn scale.
Solve for $x : \frac{\log 289}{\log 17}=\log x$
→