to find percentages, simply take the number that is not the "100%" number and divide it by the other number.
in this case,
52 / 130
complicated way of figuring it out if it makes more sense for you,
find how much is 1% of 130
130/100= 1.3
1% of 130 = 1.3
and then you just take 52 / 1.3
feel free to comment any questions on how to figure out future problems
