Question

[nguyen thi phuong thao]

so A tang 60% thi duoc so B vay so B phai giam bao nhieu phan tram de duoc so A

Answer 1

[Nguyễn Quốc Khánh]

Ta có:

a+60%xa=b

<=>160%xa=b

<=>1,6a=b

<=>a=b:1,6

<=>a=5/8b

<=>a=62,5%b