The cost of a train ticket increases by 10% to £19.25 what was the original cost

100% : 110%

x : 19.25

(cross multiply)

17.5

hope this helps

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

i got 10.28 but that rounds up to 10.3