Comparing Quantities
NCERT Mathematics for Class 7, Chapter 8, Comparing Quantities, opens with shop bills, discounts, and marks of two classes. It revises ratios as comparisons, converts between fractions, decimals, and percentages, and applies the unitary method to prices and speeds. Profit and loss from cost and selling prices, discount on marked price, service charges, and simple interest on savings give the practice ground. Children estimate first, compute carefully, and interpret what each percent means for money.
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