Saul makes Apple Green paint and Citron Green paint. He mixes green paint with white paint as shown.
Apple Green
Citron Green
green : white = 2:1
green : white = 4:5
He makes 90 litres of Apple Green paint.
To this Apple Green paint he adds 24 litres of green paint.
How much more white paint does he need to add to make Citron Green paint?
Your final line must say, He needs to add ... litres of white paint.