Continuous Percentage +/- at the Beginning of Expressions

[Kiritorz]

Describe the bug

I understand the special operation rules of percent signs. However, for consecutive addition or subtraction percent operations at the beginning of a recursive expression, according to the tendency of regular users, should this be treated as a special case?

For example, when encountering expressions like a% + b% + c% +... at the start of a calculation, currently, it seems to be interpreted as a% * (1 + b%) * (1 + c%), rather than (a+b+c)%. This can lead to unexpected results.

To Reproduce

Take the expression 10% + 10% + 100 + (10% + 10% + 100) + 10% + 10%. Currently, mathjs interprets it as (0.11 + 100 + (0.11 + 100)) * 1.1 * 1.1, which is different from the expected value of (0.2 + 100 + (0.2 + 100)) * 1.1 * 1.1.

I think this might be a special case in percentage shorthand operation logic and could be considered for a future update. Has this been considered? If so, are there any plans to address this behavior?

[Kiritorz]

The system calculator on iOS specifically handles the addition or subtraction of percentages at the beginning of an expression in this special way.

[josdejong]

Moving this into a discussion

[josdejong]

I'm ok with thinking though improving the behavior of percentage, I'm open to a PR that implements an improvement. It can be that the new behavior is a trade-off, we really have to see how it works out.