Life skills · Grades 6–8
Money & planning · Formula sheet
Rules, conditions and small examples in one printable reference.
Remember this
Compare unit prices
Compare prices for equal amounts and in the same currency.
unit price = total cost ÷ quantity
154 ÷ 11 = 14
Percentage discounts
Find the discount, then subtract it from the original price. Ignore taxes unless given.
sale price = original × (1 − rate/100)
460 × (1 − 50/100) = 230
A simple budget balance
A negative balance means expenses exceed income in this exercise.
balance = income − expenses
300 − 130 − 150 = 20
Scale a recipe
Scale each ingredient by the same factor.
new amount = old amount × new portions / old portions
150/2 × 20 = 1500
Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.