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<span><span>15 - 19</span><span>1010</span></span> <span><span>In 15, multiply the whole number, '1', by the denominator of the fraction, '10' to get '10'. This shows that the whole number represents 10.</span><span>1010</span></span> To find the numerator when this mixed number is shown as an improper fraction, use addition. <span><span>10 + 5 = 15</span><span>101010</span></span> <span><span>In 19, multiply the whole number, '1', by the denominator of the fraction, '10' to get '10'. This shows that the whole number represents 10.</span><span>1010</span></span> To find the numerator when this mixed number is shown as an improper fraction, use addition. <span><span>10 + 9 = 19</span><span>101010</span></span> The addition is now simpler because the whole numbers have been eliminated, leaving only two fractions. <span><span>15 - 19</span><span>1010</span></span> Subtract the numerators. <span>-410</span> Simplify fraction -4/10 by dividing out the greatest common factor of 2 from the numerator and denominator. <span><span>-4 = -2</span><span>105</span></span>
