04 Try it yourself Interactive

The same scenario, solved from four directions

Switch the first control and the console solves for a different unknown while the rate and time stay put. Watch the two percentages in the stat row: they never change, only what you do with them does. The rate-finding and time-finding cases work the same way and are left for the practice problems.

₹8,320 in 5 years at 6%
130% → 8320 · P = 6400
The given value is read as whichever quantity you said you were given — a principal, an interest or an amount. That is the point of the first control.
Press Next to work through it one step at a time.
Interest %
Amount %
Interest
Amount
step 0 / 0