It's a 33% increase, or an increase of 1.07 percentage points. It's not a 1.07% increase.

Hmm. As old as the concept of percentages is, you'd think that there would be a good symbol to indicate an increase in percentage points.

> As old as the concept of percentages is, you'd think that there would be a good symbol to indicate an increase in percentage points.

Uh, there is such a notation -- (sign)(# of percentage points change)pp. Or, in the instant case, +1.07pp.

(Though it would probably be more ideal if %p were accepted instead of pp, because then there would be a natural extention to ‰p, etc.)

I rather like %p.

What would ‰p mean? Percent-degree-points?

"Per-milleage" [0] points (same relation to per-mille as percentage points are to percent; 1 percentage point = 10 per-milleage points = 100 basis points.)

[0] I have no idea if there is a standard term for this, and if there is, that's probably not it.

Promille points.

Yeah that seems to be the core of it. Without the percentage sign what they wrote seems technically valid but very likely to be misunderstood.

It's an increase.

Its a 1.07pp (percentage point) increase, which is identical to 107 basis point increase. A 1.07% increase is a 1.07× multiplier, which this is not.

A 1.07% increase is a 1.0107 multiplier.