1 and 1/2 is the right one
60%
Working
£5:100%
£1:20%
£8:160%
So percentage increase is 60%
The difference (the answer of a subtraction problem) is:
2/7 - 2/5 --> 10/35 - 14/35 = -4/35
The answer sum (the answer of an addition problem) is:
2/7 + 2/5 --> 10/35 + 14/35 = 24/35
Hope this helps.
