Answer:
Ivan gets £90 more than Tanya
Explanation:
sum the parts of the ratio , 4 + 1 = 5 parts
divide the amount being shared by 5 to find the value of 1 part of the ratio
£150 ÷ 5 = £30 ← value of 1 part of the ratio , then
4 parts = 4 × £30 = £120 ← amount Ivan receives
£120 - £30 = £90
Ivan gets £90 more than Tanya