Increase £64 by 70%?

I'm not sure if you used the euro sign accidentally or what but this is how to increase 64 by 70%

divide 64 by 10.

6.40

then multiply it by 7.

44.80

then add 44.8 to your original number. (64)

the answer is:

108.8

If you did put that sign there purposely and if it means something then I don't know if it matters or if this is right.