def decimal_to_fraction (number = decimal.Decimal()):
if number == decimal.Decimal():
number = generate_decimal(0, 999)
number_in_fraction = Fraction(number)
answer = printable_fraction_from_fraction(number_in_fraction)
question = "Convert {} to a fraction. Simplify the fraction, if required.".format(number)
return (question, answer)
def fraction_as_percentage (number = Fraction ()):
if number == Fraction():
possible_denominators = [2, 5, 10, 20, 25, 50]
selection = random.randint (0, len (possible_denominators)-1)
denominator = possible_denominators[selection]
numerator = random.randint(2, 15)
while (numerator == denominator and numerator % denominator != 0):
numerator = random.randint (2, 15)
number = Fraction(numerator, denominator)
logging.info ("{} {} {}".format (selection, denominator, printable_fraction_from_fraction(number)))
question = "Express fraction {} as a percentage.".format (printable_fraction_from_fraction(number))
original_precision = decimal.getcontext().prec
decimal.getcontext().prec = 2
answer = number.numerator * 100/number.denominator
answer = "{} %".format (answer)
decimal.getcontext().prec = original_precision
return (question, answer)
def __printable_expression_fractions (fraction_list, ops_list):
if fraction_list == None or len (fraction_list) == 0 or ops_list == None or len (ops_list) == 0:
logging.info ("Invalid parameters passed to function.")
return False
expression = ""
for i in range (0, len (fraction_list)):
if fraction_list[i].numerator > fraction_list[i].denominator:
expression += "{}".format (printable_mixed_fraction(fraction_list[i]))
else:
expression += "{}".format (printable_fraction_from_fraction(fraction_list[i]))
if i <= len (fraction_list) -2:
expression += " {} ".format (ops_list[i])
return expression
def multiple_decimals_to_fractions (decimal_list = []):
dec_list = []
if not decimal_list:
i = 0
if len(decimal_list) <= 4:
dec_list.append (decimal.Decimal(random.randint(1,9)/1000).quantize(decimal.Decimal('0.001'), rounding=decimal.ROUND_DOWN))
dec_list.append (decimal.Decimal(random.randint(111,999)/1000).quantize(decimal.Decimal('0.001'), rounding=decimal.ROUND_DOWN))
dec_list.append (decimal.Decimal(random.randint(1,9)/100).quantize(decimal.Decimal('0.01'), rounding=decimal.ROUND_DOWN))
dec_list.append (generate_decimal(0, 9999).quantize(decimal.Decimal('0.001'), rounding=decimal.ROUND_DOWN))
decimal_list = dec_list
fraction_list = []
answer = ""
question = ""
for i in range (0, len (decimal_list)):
fraction_list.append( Fraction(decimal_list[i]))
answer += printable_fraction_from_fraction(fraction_list[i])
question += " {}".format (decimal_list[i])
if i != len (decimal_list) -1:
answer += ","
question += ","
question = "Convert the decimals into their equivalent fractions : {}".format (question)
return (question, answer)
