Example 1: A sum of Rs 12,000 at simple interest amounts to Rs. 15,000 in3 years Find rate %. SI=15000-12000=3000Rs. SI= P*r*t/100 Rate= 3000*100/12000*3 =8.3% Example 2: what annual payment will discharge at a debt of Rs 750 due in 5 years, the rate of interest given is 5% per annum? Direct Formula Annual payment=

Whenever we keep any amount on bank we are paid interest. The interest is usually specified as, say4% per annum. 4 % Per annum means if money invested is 100then interest is 4 % i.e. 4 Rs every year. Principal: Which is denoted by P. The money lent for certain period is called principal. Amount:

Example 1 : Find 8 percent of Rs. 225. 8% of 225=8*225/100 2/25*225=18 Rs Example 2: Express 20, as a percentage of 40. 20/40 *100 =50% Example 3: The population of town has increased from 50,000 to 60,000, find increased percentage? Increase in population= 60,000-50,000=10,000 Percentage increase= 10,000/60,000 *100 =100/6% Example 4: In a basket

We all use percentage in our daily routine. The term percent mans for every hundred. In its simplest sense percent i.e. per hundred. Thus the expression 20% means 20/100 To express n% as a fraction: n%/100 To express a/b as percentage: (a/b x 100)% Thus 3/5= (3/5 x100)% =60% For example: India won 50% of