Question

A car factory produced 20 cars in a day. After the equipment was renovated and another one was brought to the factory, the factory started to produce 70 cars per day. By what percent did the speed of car production increase?

Answer 1

Answer:

The speed of car production increase at 250%

Step-by-step explanation:

we know that

20 cars in a day represent the 100%

so

Using proportion

Find out how much percentage represent the production increase

The production increase is 70-20=50 cars per day

$\frac{20}{100\%} =\frac{50}{x}\\\\x=100(50)/20\\\\x=250\%$

therefore

The speed of car production increase at 250%