Worked examples
Two examples
Example 1
15 is 30% of what number?
- Divide the part by the percent as a decimal: 15 ÷ 0.3 = 50.
- Check: 30% of 50 is 15.
Answer: 50
Example 2
42 is 60% of what number?
- 42 ÷ 0.6 = 70.
- Check: 0.6 × 70 = 42.
Answer: 70
Where this is taught: Ratio, Proportion, and Percent, “One proportion for all three”
The drill
Ten problems
This drill also has challenge problems. They use the same skill, set up the way the GED test sometimes sets up a problem, so that it looks new at first.
How many:
Type each answer, then press Check my answers at the bottom. Commas in large numbers are fine.Write each answer on the line. The answer key, with the reasoning, is on the last page.