Suppose 42 stamps are added to a stamp collection that has 30 stamps. what is the percent of change? round your answer to the nearest tenth, if necessary.

The percentage change in the number of stamps is 140%.

Step-by-step explanation:

We are given the following information in the question:

Number of stamps added = 42

Initial number of stamps = 30

Total umber of stamps = 72

Formula:

Percentage change =

Putting the values, we have:

Hence, the percentage change is 140%.

rounding to the nearest thousandth would be 452,000