Weegy: This year he set a record high for vacuum sales with 567 vacuums sold. The previous high was last year, when 540 vacuums were sold. The percent of increase in sales from last year to this year is: [(567-540)/540]*100%=5%
User: find the missing number :7=12:21
Weegy: x:7 = 12:21; 21x = 12 * 7; 21x = 84; x = 84/21; x = 4; 4:7 = 12:21
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