Question

A school bus reduces its speed from 60 m/h to 40 m/h. What is the percentage decrease in
speed

Answer 1

Answer:

33.33%

Step-by-step explanation:

60-40 = 20

20/60= 33.33%

Answer 2

The percentage decrease in  "speed 33.33 percent(%)".

Step-by-step explanation:

Given,

The speed of school bus = 60 $\dfrac{m}{h}$ and

After reducing, the speed of school bus = 40 $\dfrac{m}{h}$

To find, the percentage decrease in  speed = ?

∴ The decrease in  speed = The speed of school bus - After reducing, the speed of school bus

= 60 - 40 = 20  $\dfrac{m}{h}$

The percentage decrease in  speed $=\dfrac{The decrease in speed}{The speed of school bus}\times 100$

$=\dfrac{20}{60}\times 100$

$=\dfrac{1}{3}\times 100$

= 33.33%

Hence, the percentage decrease in  "speed 33.33 percent(%)".