kak tinggal dua soal sya tdak bsa jwab.. minta tolong kak djwab beserta caranya kak

1. 50/100+75/100x1/25-1 1/4
50/100+75/100x4/100-1 25/100
1 475/100=5 75/100
2. 1 3/8 x 5/12 - 20/100
= 24/8 x 5/12 - 20/100
= 42/4 x 15/4 - 500/4
= 630/4 - 500/4
= 130/4
= 32 1/2