Пожалуйста помогите решить эти задания а) 8/18—8/27 б) 7/16-–5/24 в) 2/11–1/12 г) 12/13–15/26 д) 9/28–11/35 е) 39/40–19/28

а ) 8 / 18 — 8 / 27 = ( 8 * 6 - 8 * 4 ) / 108 = ( 48 - 32 ) / 108 = 16 / 108 = 8 / 54 = 4 / 27 б) 7 / 16 - 5 / 24 ) = ( 7 * 3 - 5 * 2 ) / 48 = ( 21 - 10 ) / 48 = 11 / 48 в) 2/11–1/12 = ( 2 * 12 - 1 * 11 ) / 132 = ( 24 - 11 ) / 132 = 13 / 132 г) 12/13–15/26 =( 24 - 15 ) / 26 = 9 / 26 д) 9 / 28 –11 / 35 =( 5 * 9 - 11 * 4 ) / 140 = 1 / 140 а) 25/28–18/35 = ( 25 * 5 - 18 * 4 ) / 140 = 53 /140 б) 40/63–35/72 =( 40 * 8 - 35 * 7 ) / 504 = 75 / 504в) 22/21–21/22 = ( 22 * 22 - 21 * 21 ) / 462 = 43 / 462г) 40/134–41/156 = ( 40 * 78 - 41 * 67 ) / 10 452 = 373 / 10 452д) 43/126–41/135 = (43 * 15 - 41 *14 ) / 1890 = 71 / 1890е) 239/240–229/288 = ( 239 * 6 - 229 * 5) / 1440 = 289 / 1440