21
3/7 = 27/635/9 = 35/6327/63 - 35/63 = -8/63
21/63 = 1/3
63/147 = 3/7
3/4
63/147 = 3/7
= 1.31746032 8/9 + 3/7 = 56/63 + 27/63 = 83/63 = 1 20/63 (or 1.31746 in decimal form).
9/63 = (9÷3)/(63÷3) = 3/21 = (3÷3)/(21÷3) = 1/7 but as 6+3 = 9, 63 is divisible by 9, so: 9/63 = (9÷9)/(63÷9) = 1/7
27/63 = 3/7
42/63 = 2/3
42/63 = 2/3
Yes. 63/84 = 3/4
63/42 = 3/2