tolong jawab ya kak please

1. 2/5 + 3 ¹/4 = 2/5 +13/4 =8/20 + 65/20 = 73/20 = ³13/20
2. ²4/7-¹2/21 = 18/7 - 23/21=54/21-23/21 = 31/21=¹10/21