$3.5$ can be expressed in terms of percentage as:

$40 \%$ are the passing marks. $A$ student gets $250$ marks yet fails by $38$ marks. What is the maximum marks?

If $200 \%$ of a number is $90,$ then what is the $80 \%$ of that number?

$? \times 15 = 37.5 \%$ of $220$

Neha has a watch which gains $2 \%$ per hour when the temperature is in the range of $40^{\circ}C - 50^{\circ}C$ and it loses at the same rate when the temperature is in the range of $20^{\circ}C - 30^{\circ}C$. The watch runs on time in all other temperature ranges. On a sunny day,the temperature started rising from $8$ $a.m.$ at a uniform rate of $2^{\circ}C$ per hour and during the afternoon it started falling at the same rate. Find what time will it be by the watch at $7$ $p.m.$ if at $8$ $a.m.$ the temperature was $32^{\circ}C$ and at $4$ $p.m.$ it was $40^{\circ}C$?

Dinesh's monthly income is four times Suresh's monthly income. Suresh's monthly income is $20\%$ more than Jyoti's monthly income. Jyoti's monthly income is $₹ 22,000$. What is Dinesh's monthly income?