Well,It depends on the shape of the kite and to decide that something is congruent is it has to be the exact same shape looks same everything same YW :D
Divide - 48 / 8 which equals 6. Stacey makes 6 necklaces in 1 minute. Then, do 24 / 4. This also equals 6. Nick makes 6 necklaces in one minute. Therefore, their speed is equivalent.