Bob's gift shop sold a record number of cards for Mother's Day. One salesman sold 30 cards, which was 20% of the cards sold for Mother's Day. How many cards were sold for Mother's Day?
Insert the values given in the problem then scale up or down to find the missing value.
Let x be the total number of cards sold for Mother's Day.
We know that one salesman sold 30 cards, which was 20% of the total number of cards sold:
0.20x = 30
x = 30 / 0.20
x = 150
Therefore, there were 150 cards sold for Mother's Day.