This recipe makes 7 portions of fajitas.
Carly has 900 g of chicken, 1700 g of peppers, 250 g of onion, 50 g of spice mix and 10 tortillas.
How much more of each ingredient will she need to make 21 portions by following this recipe?

Recipe: Serves 7
500 g chicken
800 g peppers
100 g onion
30 g spice mix
14 tortillas