Need help on maths foundation question Gcse

Question:

Eve is counting the photos on her phone.
The ratio of the number of photos of her family to photos of her friends is 3:7.
She has 450 photos of her family.
80% of the photos of her friends include Jack.

Work out how many of the photos of her friends include Jack.

Could someone also explain the process and how you got the answer. Thank you

We can't give answers just hints - post what you've tried

Family: friends

(3/450:70/80)x150
150x70=10,500

Answer 10,500