Problem: in the new budget the price of wheat rose by 8 % . by how much percent must a person reduce his consumption so that his expenditure on it does not increase ?
Rationale: reduce in consumption = r / ( 100 + r ) * 100 % = 8 / 108 * 100 = 7.41 % answer is b
annotated_formula: multiply(divide(divide(8, const_100), add(divide(8, const_100), const_1)), const_100)