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how to express decimal in p/q form

Hey student, Let's know how to covert decimal expansion to p/Q  form So let's start,                                 __ Example- convert 1.27 to p/q form and q is not equal to 0 First step,           —— Let 1.27 = x             __ X = 1.27 X = 1.272727......... — 1 After multiply by 100 X x 100 = 1.272727...... 100 x = 127.272727....... — 2 Now substract equation 2 from 1  100x -x = 127.272727 -  1.272727 99x = 126 Now move 99 to opposite side X = 126 /99 = 42/33 Where p= 42  and q= 33 Hope you understand If any dought comment me           Thanks............