Answer:
1.893%
Explanation:
20% of deposit = .2 x £1099 = £219.8
10 mostly installment of £90 = £900
Installment plan cost = £1119.8
Percent increase = (Payment plan / Original cost) - 1 = (£1119.8/£1099) -1 = .01893
or 1.893%
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