Introduction to Simple Interest

04 Try it yourself Interactive

Work any simple interest question one step at a time

Pick the three givens and press Next. Each press does exactly one thing — find one year’s interest, repeat it, check the formula, add the amount. The bottom line shows the single percentage the principal grows by, which is the number the reverse questions turn on.

₹1000 at 10% for 3 years

SI = 300 · A = 1300

Time is always in years — 6 months is 0.5 and 2 years 6 months is 2.5, which is why those two appear on the list rather than a count of months.

Press Next to work through it one step at a time.

Total SI %–

One year–

Interest–

Amount–

step 0 / 0