there were some chicken wings and fishballs in a pack. after 2/7 of the chicken wings were taken out of the pack, there were 3/10 as many chicken wings as fishballs in the pack. (more in description)

Question

there were some chicken wings and fishballs in a pack. after 2/7 of the chicken wings were taken out of the pack, there were 3/10 as many chicken wings as fishballs in the pack. if there were 50 fishballs how many chicken wings were there in the pack at first?

please show working.

Answer 1

C - 2C/7 = 3F/10 = 3(50)/10 = 15

5C/7 = 15

5C =105

C = 105/5 = 21 chicken wings originally

2/7ths removed left 21-6 = 15 left

15 is 0.3(50)