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- AU Year 7 Maths
- Introduction to Ratios, and Percentages
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?
Do better in math today
3.
Introduction to Ratios, and Percentages
3.1
Representing percents
3.2
Converting among decimals, fractions, and percents
3.3
Percent of a number
3.4
Applications of percents