# Maths Percentage

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After spending 30% of his money, John had \$140 left. How much did he have at first.

Siti and Ali saved \$4500. Ali and Jim saved \$2950. Siti saved thrice as much as Jim. How much did Ali save?

At a concert, there were 15 more children than adults. Each child paid \$5 each and each adult paid \$10 for a ticket. If the total amount of money collected from them was \$150, how many children were there?

• Maths Percentage (Partial) -

1. (1-.30)x = 140

3. C = A + 15

5C + 10A = 150

Substitute A+15 for C in second equation and solve for A. Insert that value into the first equation and solve for C. Check by inserting both values into the second equation.

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