Haruka hiked several kilometers in the morning. she hiked only 666 kilometers in the afternoon, which was 25\%25%25, percent less than she had hiked in the morning

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?