Answer:
£90 more
Explanation:
sum the parts of the ratio, 4 + 1 = 5 parts
Divide the amount by 5 to find the value of one part of the ratio
£150 ÷ 5 = £30 ← value of 1 part of the ratio, then
4 parts = 4 × £30 = £120 ← Ivan's share
£120 - £30 = £90
Ivan got £90 more than Tanya