Question

53²-27²
______
79²-51²

Answer 1

$\frac{ {53}^{2} - {27}^{2} } { {79}^{2} - {51}^{2} } = \frac{(53 - 27)(53 + 27)}{(79 - 51)(79 + 51)} = \frac{26 \times80}{28 \times 130} = \frac{4}{7}$

Answer 2

$\frac{53 ^{2}-27 ^{2} }{79 ^{2}-51 ^{2} } = \frac{(53-27)(53+27)}{(79-51)(79+51)}= \frac{26*80}{28*130} = \frac{2*2}{7}= \frac{4}{7}$