1. Find ordinary interest using approximate time: Principal Rate From To a. P10,000 12% May 10 July 10 b. P22,000 18% January 10 March 25 2. Find ordinary interest using actual time: Principal Rate From To a. P6,500 18% January 6 February 5 b. P7.500 15% July & August 13 3. Find the maturity value at ordinary interest: Principal Rate Time a. P8,000 15% 30 days b. P2,090 22+% 20 days 4. Find the exact interest: Principal Rate Time a. P90,000 15% 90 days b. P80,000 21% 60 days