The length of a rectangle is increased by 30% and the width is decreas

1.	The length of a rectangle is increased by 30% and the width is decreased by the same per cent. What is the percentage change in area ?
Answer» length will be - 1.3Lwidth- 0.7 Wnew are will be = 0.91 LBpercentage change in area= 0.91LB- LB/100-9decrease by 9 Percentage but how will be the length 1.3 l+ ( l*30/100)so it will be 1.3l why 1+ 1× 30/100 percentage increase is written there that's why

The length of a rectangle is increased by 30% and the width is decreased by the same per cent. What is the percentage change in area ?

Answer»

length will be - 1.3Lwidth- 0.7 Wnew are will be = 0.91 LBpercentage change in area= 0.91LB- LB/100-9decrease by 9 Percentage

but how will be the length 1.3

l+ ( l*30/100)so it will be 1.3l

why 1+ 1× 30/100

percentage increase is written there that's why