=49/53 * (113/14 - 15/8 * 16/7 ) = 49/53 *113/14 - 15 * 2/7 ) = 49/53 *(113/14 - 30/7) = 49/53 * (113 - 60/14) =49/53 * 53/14 =49/14 = 3 7/14