increase by 10% or increase 10%

[BobK]

So are we all in agreement that, considering a base of 70%, an increase of 10% and increased by 10% both produce 77%?

OKOKOK. All right already. I am eating humble pie. 'Uncle' has been officially hollered. It does.

b

[MikeNewYork]

OK OK OK I'm eating humble pie! There - satisfied? It does

b

I was not rubbing your nose in anything. I just wanted the original poster to be clear.

[yppah]

Thanks, teachers!
I also checked the dictionary, which confirms that it should be "increase (something) BY something", eg. Food prices increased by 10% in less than a year.

I am clear about it now.

Thanks again.

[MikeNewYork]

Thanks, teachers!
I also checked the dictionary, which confirms that it should be "increase (something) BY something", eg. Food prices increased by 10% in less than a year.

I am clear about it now.

Thanks again.

That's just fine. But don't be surprised to see the other. It is also correct.

Food prices increased 10% in less than a year.

Both versions have the same meaning.