Twenty is what percent of 400? 5% 80% 40% 20%

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Oliver read for 450 minutes this month his goal was to read for 10% more minutes next month if all of her medicine go how many minutes will you read all during the next two months

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.