(10t-9.6t)/10t * 100%=4%
/kloc-burning coal in October is 4% less than that in September.
Last year, 45 million yuan was invested to build a marine farm, and this year, 54 million yuan was invested. How many percent more than last year?
(54 million yuan-45 million yuan)/45 million yuan * 100%=20%
This year is 20% more than last year.
3. The original price of a commodity is 200 yuan, and the current price is lower than the original price by 30 yuan. What percentage?
30 yuan /200 yuan * 100%= 15%.
Decrease 15%
4. The working efficiency of producing parts in the first workshop is 320/ hour, and it takes 8 hours to complete a batch of parts. Now, after improving the technology, it only takes 5 hours to complete the same task. How much shorter is the time used now than before? How many percent has the efficiency of producing parts in this workshop increased compared with the original one?
(8 hours -5 hours) /8 hours * 100%=37.5%
The time used now is 37.5% shorter than before.
[(320 hours *8 hours) ÷5 hours -320 hours ]÷320 hours * 100%=60%.
0.75 km more than 600 m (
25
)%
1 yes 10 (
10
)%
5/4 is greater than 1 (
25
)%
(
48
) It's 30.