The first step is to put the fraction in its simplest form, by dividing both denominator and numerator by any common divisors. In this case, both 21 and 84 can divide by 21, so do this and we get 1/4. The next step to find any equivalent fractions is to multiply top and bottom of this fraction by any integer (1, 2, 3, 4...). This gives the first few equivalent fractions of 21/84 as:
1/4, 2/8, 3/12, 4/16...
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equivalent fractions of 3/21 = 6/42, 9/63, 12/84,...
7/8, 14/16
42/200, 63/300, 84/400, 105/500,...To get the equivalent fractions of 21/100:Multiply 21/100 by 2/2, 3/3, 4/4, 5/5,...21/100 * 2/2 = 42/20021/100 * 3/3 = 63/30021/100 * 4/4 = 84/40021/100 * 5/5 = 105/500Equivalent fractions of 21/100 = 42/200, 63/300, 84/400, 105/500,...
It is any fraction of the form (21*k)/(84*k) where k is a non-zero integer, or a common factor of the two.
It is: 60/84 = 5/7 in its lowest terms