The percentage increase in the speed of the car from 40 km per hour to 56 km per hour will be 71.43%.
What is the percentage?
The amount of something is expressed as if it is a part of the total which is a hundred. The ratio can be expressed as a fraction of 100. The word percent means per 100. It is represented by the symbol ‘%’.
A car is travelling at 40 kilometres per hour.
The car increases its speed to 56 kilometres per hour.
Then the percentage increase in the speed of the car will be
[tex]\rm P = \dfrac{40}{56} \times 100\\\\P = 71.4285\% \approx 71.43\%[/tex]
More about the percentage link is given below.
https://brainly.com/question/8011401
