Opal won $100.00 betting on a horse race.  She put half of her winnings into savings and bet the other half of her winnings.  This time, she made a 60% profit and again, put half of her earnings into savings.  How much did she put into her savings?
She won $100.00 and put half into savings so she put 100/2 = $<T>divide(100, 2)=50.0 into savings
She won $100.00 and put $50.00 into savings so that leaves 100-50 = $<T>subtract(100, 50)=50 to bet
She bet $50.00 and made a 60% profit so her profit was 50*.60 = $30.00
The total wins in the second bet are 30+50 = $<T>add(30, 50)=80
She put half of her $80.00 earnings into savings so that's 80/2 = $<T>divide(80, 2)=40.0 into savings
She put $50.00 into saving from her 1st bet and $40.00 from her second so she has saved 50+40 = $<T>add(50, 40)=90
