According to the meaning of the question, the chicken farm used 2400 eggs to hatch chickens, and 5% did not hatch.
Then the hatching rate = 1-5%=95%
By using multiplication, the formula can be obtained:
Hatched chicks =2400*95%=2280 (only)
So the chicken farm used 2400 eggs to hatch chickens, 5% of which were not hatched, and 2280 chickens were hatched.
Extended data:
This kind of problem belongs to the application of percentage in mathematics.
Conversion between percentages and decimals
(1) Decimal system: Delete the percent sign and move the decimal point to the left by two places. For example, 75% can be converted into 0.75.
(2) Decimal percentage: add a percent sign and move the decimal point to the right by two places. For example, 0.62 can be converted into 62%
Description:
Conversion between percentage and fraction
(1) Percentalized fraction: Write the percentage as a fraction with the denominator of 100, and then reduce the differential.
Note: When the percentage of molecules is decimal, the molecules should be converted into integers first.
For example:
(2) Percentage of scores:
The numerator of (1) is divided by the denominator to become a decimal and then a percentage.
For example:
② Multiply the numerator denominator by a number at the same time to make the denominator 100, and then turn the denominator into a percentage sign.
For example:
Percentage multiplication algorithm
(1) Fractions are multiplied by fractions, the product of numerator multiplication is numerator, and the product of denominator multiplication is denominator;
(2) If there is an integer, treat it as a false fraction with the denominator of 1;
(3) If you can cut the point, cut the point first.