The total number of members enrolled in gymnasium A from 1991 to 1994 together is what percent more than the total number of members enrolled in gymnasium B in 1993 and 1994 together?(Rounded off to 2 decimal places)

Required % =

$frac{{left( {60 + 140 + 200 + 70} ight) - left( {240 + 150} ight)}}{{left( {240 + 150} ight)}} imes 100$

$= frac{{470 - 390}}{{390}} imes 100$

$= frac{{80}}{{390}} imes 100$

$= 20.51{ m{\% }}$