Question

find per of increase or decrease-price of shirt decreased from rs 80 to rs 60 and 2) mark in test imcreased from 20 to 30 . solve it now please

Answer 1

1) (80-60)/80=20/80=1/4
1/4×100=20%

2) (30-20)/20=10/20=1/2
1/2×100=50%