Question

factory produces 40 cars per week what is the percentage change in production 30 cars per week 50 cars per week​

Answer 1

Answer:

We have two rates and hence two different total number of toys produced: 100% of original machines at original rate, then 40% of machines at a new rate and 60% of machines at original rate

Assume 100 machines.

Change rates in minutes to rates in hours.

And assume time = 1 hour

Finally, 40% of 100 are new = 40 new machines and 60 old machines

Number of machines * R * T = Work

Rates in minutes --> rates in hours

Original rate:

, =

and

New rate FOR 40 MACHINES: =

(1). Original number of toys produced

100 machines at the original rate of produce (100 * * 1) = 2,000 toys originally produced

(2). Some old plus some new machines at different rates = new number of toys produced

So total toys produced now are made by 60 machines at original rate + 40 machines at new rate

Total toys that 60 machines produce: (60 * * 1) = 1,200 toys

Total toys that 40 machines produce: (40 * * 1) = 1,200 toys

1,200 + 1,200 = 2,400 total toys now produced

(3). Percent change: x 100 :

* 100 = 20%