What's the percentage of life?

1, and the germination rate of wheat is 70%.

2. The volume of oxygen in the air accounts for about 20%.

3. In this sweater, wool accounts for 85% and chemical fiber accounts for 15%.

4. China occupies about 7. 1% of the world land area (except Antarctica).

5. The world ocean area accounts for 7 1% of the earth's surface area.

6. Of the world's total water storage capacity, 97% is seawater.

7. The Yangtze River is 2.8% shorter than the Amazon River.

Percentage is a special fraction, the denominator is 100, and the numerator is not an integer. Percent means that one number is a percentage of another number, which means that the ratio has no unit name.

Percent is a way to express the value of proportion, ratio or fraction, such as 82% for 82%, or 82/ 100, 0.82. Sum and discount represent a few tenths, such as "70%" and "30%", which represent 70/ 100 or 70% or 0.7 respectively.

Percentage refers to the percentage that one number is another number, also known as percentage or percentage. Percentages are usually not written in the form of fractions, but are represented by the symbol "%"(percent sign).