Percent of Change/Error

At noon the rain barrel had collected 3 gallons of water. After several hours, it collected an additional 45% of that amount. How many total gallons of water has the rain barrel collected so far?

Mathematical Equivalence

OFF

Mathematical Equivalence

ON

A band expects to have 16 songs on their next album. The band writes and records 62.5% more songs than they expect to have in the album. During the editing process, 50% of the songs are removed. How many songs will there be in the final album?

Mathematical Equivalence

ON

In the first week of July, a record 1,060 people went to the local swimming pool. In the second week, 105 fewer people went to the pool. In the third week, 135 more people went to the pool than in the second week. In the fourth week, 136 fewer people went to the pool than in the third week.

What is the percent of change in the number of people who went to the pool between the first and last weeks?

Mathematical Equivalence

ON

The dot plot shows predictions for the winning time in a 200-meter sprint. The winner finished the race in 22.3 seconds. Find the prediction that had the greatest percent of error. Round the percent of error to the nearest tenth of a percent.

Mathematical Equivalence

ON

The amount of money in a savings account increases from $250 to $270 in January. If the percent of increase remains the same next month, how much money will be in the account at the end of February?

Mathematical Equivalence

ON

A winter snowstorm dumped 6 inches of snow on the town of Clayton. Prior to the storm, a meteorologist made a prediction of the amount of snow that would accumulate. His prediction was 25% less than the actual amount of snowfall. How many inches of snow did he predict would fall during the snowstorm?

Mathematical Equivalence

ON

The cost of tickets for a soccer game costs $78 each. You purchased a total of 4 tickets. A service fee was added to the ticket order, which brought the total to $368.16. What is the service fee as a percent of increase in the cost of the ticket order?

Mathematical Equivalence

ON

The table shows data from an experiment with two trials. Calculate the percent errors. How much greater was the percent of error in trial A than trial B?

Mathematical Equivalence

ON

Archer Lodge Middle School held an interest meeting for the class trip to Spain. It was estimated that 75 student families would attend the meeting. There were actually 110 families that attended the event. What was the percent of error?

(Round to the nearest whole percent.)

Mathematical Equivalence

ON