Consider the above reaction where $6.1 \mathrm{g}$ of benzoic acid is used to get $7.8 \mathrm{g}$ of m-bromo benzoic acid. The percentage yield of the product is ___ .

(Round off to the Nearest integer)

[Given : Atomic masses : $\mathrm{C}=12.0 \mathrm{u}, \mathrm{H}:1.0 \mathrm{u}, \mathrm{O}:16.0 \mathrm{u}, \mathrm{Br}=80.0 \mathrm{u}$]