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**Sazza** Hey, i'm doing some stuff on percentage, and i'd just like to clarify somethings, if that's okay???:

I have to find the simple interest on: $620 at 8.5% p.a. for 2 years. I have so far as workings is concerned: i = p*r*t/100

= 620 * 8.5 *** **24/100

i can't figure out weather i multiply the rate by the time or divide it!

also: i don't have a clue how to do this, i'm not really that good at these: $3500 at 9% p.a. for 3 years, 9 months.

and also to clarify one more thing: Steve received an extra $36.75 in his pay packet after receiving a pay rise of 71/2%

calculate:

a) Steve's wage before his pay rise: (my workings so far) 7.5 divided by 100 (relating %, you know how the % can be a 100) * 36.75 = 2.76

b) steve's wage now--???

Thanks,