一人くらい増えても減ってもたいしたことはない。の英語

One person more or less doesn't make much difference.

It will not add anything to the situation.

to increase in number―decrease in number

It cannot be realized if even one of them is lacking.

The number has noticeably―appreciably―increased.

We are inferior in numbers―inferior in numerical strength―We are outnumbered.

the state of having both an excess and a deficiency

One more or less makes a material difference.

Modesty will get you nowhere.

It is no matter if it is left alone

You may leave it alone.

of amount, being not scant

the state of a group being inferior in number compared to another group

to decrease gradually in number

The number ought to be decreased by selection.

You haven't ever had to suffer a broken heart, or anything else, for that matter.

of something, being neither added nor subtracted

There is no advantage in doing that.

to increase the number―decrease the number

Enrollment capacity is unlimited.

of a quantity, being very small

The number is noticeably increasing―appreciably increasing.

It had a good deal of influence on some people.

Fewer Lessons and More Worries

There is no profit in worrying.

Nothing ventured, nothing gained.

of something, being countlessly many

It matters little what you do.

No matter how humble it is, there's no place like home.

Flattery will gain you nothing.＝Flattery will gain nothing for you.