The federal minimum wage once rose from $4.25 to $4.75. to the nearest tenth of a percent, what was the percent increase?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of