It is: 9 and 10
90/126 is 5/7 in its lowest terms
90/98 in lowest terms is 45/49
90/100 = 9/10
3/20
90/35 = 18/7
7 / 30
The simplest form for 81 over 90 is 9/10
84 over 90 in the lowest terms is 14/15
90 over 95 in lowest terms is 18/19
Both numbers divide by 9 to give 7/10
81/90 - 40/90 = 41/90