Changes

<div style="font-size:30px">'''PMT(r,np,pv,fv,ty)'''</div><br/>

<div style="font-size:30px">'''PMT (Rate,NoPaymentPeriods,PresentValue,FutureValue,Type)'''</div><br/>

*<math>Rate </math> is the interest rate.

*<math>Rate </math> is the interest rate.