This math topic focuses on determining the whole number when given a specific value that represents a certain percentage of that number. The skill practiced involves finding the base number from a known percentage (30% and 10%), requiring an understanding of foundational percentage calculations. This activity is situated in a broader introductory unit on percentages and involves solving problems such as "18 is 30% of what number?" or "6 is 10% of what number?", with choices provided for each problem to select the correct answer.
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
Find what the full number is for the given percent
21 is 30% of a number