- Home
- Third Year Maths
- Percents
Percent of a number
- Intro Lesson: a7:31
- Lesson: 1a2:17
- Lesson: 1b3:12
- Lesson: 1c2:45
- Lesson: 1d3:48
- Lesson: 22:17
Percent of a number
In this section, we will try to estimate the percent of a number without using a calculator. The trick is to breakdown the percent into smaller percent first. These smaller percentages are easier for mental calculation.
Lessons
- Introductiona)
- What is a percent?
- How to find the percent of a number?
- 1.Evaluate without using a calculator. Then, check your answers with a calculator.a)15% of 40b)320% of 600c)17.5% of 20d)2041% of 50
- 2.The total rain precipitation of last summer was 350 mm. If it increased by 1221% this summer, what was the rain precipitation this summer?