A rectangle has width a and length b.If the width is decreased by 20% and the length is increased by 10%,then what is the area of the new rectangle in percentage compared to 'ab' ? Options:
A) 77%  B) 88%  C) 92%  D) 75%  E) 68%
New area =(80/100*a*110/100*b)=(4/5*11/10*ab)=(22/25*ab).   Required percentage =(22/25*ab*1/ab*100)%=88%.   Answer is 88%
<result>B</result>
A rectangle has width a and length b.If the width is decreased by 20% and the length is increased by 10%,then what is the area of the new rectangle in percentage compared to 'ab' ?