Answer: [tex]\beta^+[/tex] decay
Explanation: General representation of an element is given as: [tex]_Z^A\textrm{X}[/tex] where,
Z represents Atomic number
A represents Mass number
X represents the symbol of an element
[tex]\beta^+[/tex]: It is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. This is also known as [tex]\beta ^+[/tex]-decay. In this the mass number remains same.
[tex]_A^Z\textrm{X}\rightarrow _{Z-1}^A\textrm{Y}+_{+1}^0e[/tex]
[tex]_8^{15}\textrm{O}\rightarrow _{7}^{15}\textrm{N}+_{+1}^0\beta[/tex]