How would you estimate a 5 percent tax and a 15 percent tip of 52.75?

round 52.75 to 50,

for the tip : find 10% which is just divide by 10, so 10% is 5, then divide 5 by 2 to get 5%, which 2.5, add 5 and 2.5 together, that is llike adding 10 and 5% togetheer, gives you 7.5, then add 7.5 onto 50, so 57.50

alternatively, divide 50 by 15, add the answer to that onto 50