Per Cent Means Out of a Hundred
Three Methods for Turning a Fraction into a Percentage
Figure it Out: Six Fractions, Nandini's Marbles, and the Long-Distance Run
Why 100 and Not 10 or 43, and Where 'Per Hundred' Came From
1.2 Percentage of Some Quantity: Who Ate More Sugar?
Free-hand Computations: The Mental Percentage Table
The FDP Trio: Fractions, Decimals and Percentages
Three Routes to 60 Marks, and the Millet Kanji Ratio
Four Ways to Finish the Ride to Agra
Percentages Greater Than 100: Kishanlal's Eight Days
Figure it Out: Missing Numbers, Bar Models and Comparisons
Figure it Out: Fill in the Blanks, and Mariam's Peculiar Bull
Word Problems, and 1.3 Using Percentages to Compare Proportions
Know Your Contents: Reading Two Badam Drink Labels
Percentage Decrease, and What Cost Price, Marked Price and Selling Price Mean
Profit and Loss Worked: The Sweater, the Old Rice, the Damaged Vase
Discounts, Gross Profit and Net Profit
Taxes: Checking the GST on a Real Bill
Figure it Out: Samson's Car, Two Buffaloes, and Cameras Down 85 Per Cent
Interest, Compounding, and Why 6000 Becomes 7986
The General Formulas: p(1 + rt) and p(1 + r) Multiplied t Times
Figure it Out: Jasmine, the Post Office, and Bacteria That Double
Decline: A Depreciating TV, a Shrinking Village, and Would You Rather?
Tricky Percentages: Cakely versus Cakify, and Surbhi's Mishap
Figure it Out: Bengaluru, World Population Shares, and GST on a Phone
Figure it Out: x% of y, the Excursion, and Three Shop Deals
Figure it Out: The 99 Per Cent Left-Handed Room, and Reading a Bar Graph
Summary of the Chapter, and the Peaceful Knights Puzzle
3.1 A Quick Recap: Testing Two Ratios by Cross-Multiplication
3.2 Ratios in Maps: What RF 1 : 60,00,000 Means
3.3 Ratios with More than Two Terms: The Spice Mix
3.4 Dividing a Whole in a Given Ratio: Concrete and Paint
Angles in a Ratio, and Figure it Out: Coins, Books and Triangles
3.6 Inverse Proportions: When More Means Less
The Rule xy = k, and Checking It on the Table
Figure it Out: Spotting Inverse Proportion in a Table
Pumps, Provisions, and Two People Working Together
Figure it Out: Which Pairs Are Inverse, and Reading Sleep Charts
Two Pumps Together, Machines, Speed, and the Summary
Proportional Reasoning-1 — part 1
Proportional Reasoning-1 — part 2
Proportional Reasoning-1 — part 3
Proportional Reasoning-1 — part 4
Proportional Reasoning-1 — part 5
Proportional Reasoning-1 — part 6
Proportional Reasoning-1 — part 7
Proportional Reasoning-1 — part 8
Proportional Reasoning-1 — part 9
Proportional Reasoning-1 — part 10
Proportional Reasoning-1 — part 11
Proportional Reasoning-1 — part 12
Proportional Reasoning-1 — part 13
The Unitary Method in Everyday Buying and Selling