To find Principal when Time Interest and Rate are given the rules are.

**Interest = (Principal × Rate × Time)/100Principal = (100 × Interest)/(Rate × Time)**

**For example:****1.** Find Principal when Time = 3 years, Interest = $ 600; Rate = 4% p.a.*Solution:*

Time = 3 years,

Interest = $ 600,

Rate = 4% p.a.

**Principal = (100 × Interest)/(Rate × Time)**

= (100 × 600)/(4 × 3)

= 60000/12

= 5000

Therefore, Principal (P) = $ 5000.

**2.** Find Principal when Time = 5 years, Interest = $ 500; Rate = 5% p.a.

*Solution:*

Time = 5 years,

Interest = $ 500,

Rate = 5% p.a.

**Principal = (100 × Interest)/(Rate × Time)**

= (100 × 500)/(5 × 5)

= 50000/25

= 2000

Therefore, Principal (P) = $ 2000.

**3.** Find Principal when Time = 4 years, Interest = $ 400; Rate = 5% p.a.

*Solution:*

Time = 4 years,

Interest = $ 400,

Rate = 5% p.a.

**Principal = (100 × Interest)/(Rate × Time)**

= (100 × 400)/(5 × 4)

= 40000/20

= 2000

Therefore, Principal (P) = $ 2000.

**Word Problems on Simple Interest.**

**In Simple Interest when the Time is given in Months and Days.**

**To find Principal when Time Interest and Rate are given.**

**To find Rate when Principal Interest and Time are given .**

**To find Time when Principal Interest and Rate are given.**

**Worksheet on Factors affecting Interest**

**5th Grade Numbers Page** **5th Grade Math Problems** **From To find Principal when Time Interest and Rate are given to HOME PAGE**

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