20% of the passengers on a bus were children. After 10 adults got off the bus, the percentage of children on the bus increased to 30%. How many passengers were on the bus in the end?

Answer 1

.2 p = c

.3 (p - 10) = c ... .3 p - 3 = c

.2 p = .3 p - 3

solve for p , then subtract the 10 adults that got off

Answer 2

please put the answer?