1/4x2/3÷(4/5-8/15)=1/6÷(12/15-8/15)=1/6÷4/15=1/6x15/4=5/8
1/4x2/3÷(4/5-8/15)=1/4×2/3÷4/15=1/4×2/3×15/4=1/6×15/4=5/8