I need your help on how best to write this sentence:
The results show that the developed methods(,) on average(,) lead to 10% less costs.
Do I need the commas before and after on average?
Learn English – Comma before ᴀɴᴅ after “on average”?
commasprepositional-phrasesstyle-manuals
Best Answer
As broad guidance, the normal place for a prepositional modifier is {S + V [+ O] + modifier} and this construction does not require a comma.
“… that the developed methods lead to 10% less costs on average.”
Other positions may be correctly adopted for emphasis, but these all do require commas:
“… that, on average, the developed methods lead to 10% less costs.”
“… that the developed methods, on average, lead to 10% less costs.”
“… that the developed methods lead, on average, to 10% less costs.”
“… that the developed methods lead to 10%, on average, less costs.”
PS I would use lower costs rather than “less costs”