11+beginnerinterest-growth
Simple Interest Math
Explore why i=Interest (what you earn/pay), P=Principal (starting amount), R=Rate (as a decimal percentage), T=Time (in years).
5
Lessons in this module
30 min module estimate
1Preview
The formula I = P × R × T
Explore why i=Interest (what you earn/pay), P=Principal (starting amount), R=Rate (as a decimal percentage), T=Time (in years).
5 minPreview lesson →
2Preview
Principal — the starting amount
Explore why 10% of 10,000=1,000.
5 minPreview lesson →
3Preview
Rate — the percentage
Explore why interest = P×R×T.
6 minPreview lesson →
4Preview
Time — how long
Explore why interest is earned per period.
6 minPreview lesson →
5Preview
Practice calculations
Explore why i=P×R×T.
8 minPreview lesson →
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