The phrase "and a reduction in the amount" is correct and usable in written English.
It can be used when discussing a decrease in quantity, often in contexts related to finance, resources, or measurements.
Example: "The new policy aims to improve efficiency and a reduction in the amount of waste produced by the company."
Alternatives: "and a decrease in the quantity" or "and a cut in the amount".
Among the regulations are more safety testing, additional recordkeeping and a reduction in the amount of lead that is allowed.
The price of Brent crude was flat at $30.85 on Wednesday, buoyed slightly by better than expected trade figures from China and a reduction in the amount of oil stored in the US.
Of those academics who said the rush to recruit extra students was lowering standards, many complained of cramped facilities, a relaxing of entrance criteria, and a reduction in the amount of time academics can spend with undergraduates.
Major areas of concern are reciprocal feelings of dissatisfaction among stakeholders, student workload, different levels of students' prior knowledge and a reduction in the amount of content that can be taught.
A combination of a rise in house prices and a reduction in the amount banks are willing to lend has meant that those looking to buy a house last year would have found it more difficult financially than at any other time in the last 20 years.
The sharp decline in crime also coincided with the end of the crack-cocaine epidemic, improved security technology (it has never been harder to steal a car) and a reduction in the amount of lead in the atmosphere, which some studies show may reduce impulsive behaviour.
One significant and permanent change among immigrant cooks is a reduction in the amount of fat used in cooking.
You may even see a reduction in the amount of time employees take for breaks and lunch.
This would mean a reduction in the amount of PE we are able to provide".
A reduction in the amount of solar radiation reaching the surface leads to lower surface temperatures.
Another perennial Government effort urged by numerous studies is a reduction in the amount of classified data.
