Fractions to Decimals

Practice mode shows one fraction at a time with no clock. Answer, and the boxes roll to the exact expansion and show the digit that decided the rounding before you move on. Four decimal places is free for everyone; 2, 3 and 5 decimal places are part of Tradermath Premium. It is the place to build the recall you then put under the clock in the test.

You pick the clock, 1, 2, 5 or 10 minutes, and get a stream of fractions. For each one, work out the decimal rounded to 5 decimal places and type the 5 digits (a leading "0." is filled in for you). A right answer is +1, a wrong one is -2. Your score is the net total when the clock runs out. The test is part of Tradermath Premium.

Fast and right is what impresses in an interview. Fast and wrong does the opposite, so get them right first and let the speed come. The scoring makes guessing a losing strategy: take the extra second to be sure.

Round. 1/14 is 0.0714285…, so to five decimal places it is 0.07143, not 0.07142. In practice mode the reveal shows the digit past the rounding point being spent, so you can see why the last digit went up.

Fraction-to-decimal conversion is a core mental-math skill tested by many proprietary trading firms. Being able to instantly estimate values like 7/16 or 5/13 helps with pricing, probability and quick estimation under time pressure on the trading desk.

Memorise the common fractions (halves, quarters, eighths, sixteenths and the reciprocals of small primes), then practise estimating the rest by long division in your head. Short, frequent sessions build recall far faster than occasional long ones, so aim for a few sessions a week.