15984778_Astronomy___Astrophysics__A_A__ti_word_verbs_and_expressions__Error_
[The phrase to question] Increase of/in As above, "of" is how much (increase of 15% = increased by 15%), "in" is the preposition for what increases, not by how much. [Error?] 
M
x
M
R
x , R
I
Astronomy & Astrophysics (A&A)
Error?