7. In a certain shop the price of a product, P, went up by 30% on Monday and down by 40% on Tues- day.
a. Write the price on Monday in terms of P.
b. Write the price on Tuesday in terms of P
Find the overall price change in % after the 2 days.

а) P - 0,3Pb) P - 0,4P100% - 30% = 70% = 0,7 Monday100% - 40% = 60% = 0,6 Tuesday0,7 * 0,6 = 0,42 = 42% after the 2 day