100%-2.5%=97.5% or $${\frac{{\mathtt{97.5}}}{{\mathtt{100}}}}$$ is the amount reduced from the discount
multiply it with your amount
$${\frac{{\mathtt{97.5}}}{{\mathtt{100}}}}{\mathtt{\,\times\,}}{\mathtt{1\,500}} = {\mathtt{1\,462.5}}$$
answer is $1462.50
Hope it helped you