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 * Estimating with Percent: Mental Math **

Estimate the percent of each number mentally. 1. 50% of 600 2. 25% of 80 3. 10% of 60 4. 20% of 50 5. 30% of 70 6. 40% of 500

Estimate the percent of each amount mentally. 7. 12% of $50.00 8. 21% of $700.00 9. 34% of $89.00 10. 8% of $123.00 11. 42% of $560.00 12. 18% of $452.00

In questions 13-18, estimate the percent for each test score. 13. 33 out of 50 14. 21 out of 25 15. 8 out of 12 16. 22 out of 33 17. 43 out of 80 18. 42 out of 52

19. The 2 highest cities in Canada are Calgary and Edmonton. Calgary is 1045 m abover sea level. Edmonton is 666 m aboove sea level. Estimate the percent that Edmonton's height is of Calgary's height.

20. The table gives the approximate area of each of the Great Lakes.
 * Lake || Area (km²) ||
 * Erie || 26 000 ||
 * Huron || 60 000 ||
 * Michigan || 58 000 ||
 * Ontario || 19 000 ||
 * Superior || 82 000 ||
 * Total || 245 000 ||

Estimate the percent of the total area that each lake covers.

21. Canada became a country in 1867. Estimate the percent that your age is of Canada's age.