Pawan and Jayshree are partners. Bindu is admitted for 1/4^th share. What is the ratio in which Pawan and Jayshree will sacrifice their share in favour of Bindu?

pawan and jayshree will contribute 1/4×1/2 = 1/8 share each.

1-1/4=3/4
assuming that initially they were sharing profit and losses equally
then
pawan=1/2×3/4=3/8
jayshree=1/2×3/4=3/8
bindu=1/4×2/2=2/8
new profit sharing ratio=3:3:2
sacrificing ratio=old-new
pawan = 1/2-3/8=4-3/8=1/8
jayshree=1/ 2-3/ 8= 4- 3/8=1/8

hence sacrificing ratio =1:1

If partnership deed is silent then according to Indian partnership act 1932 the profit sharing ratio is equal or 1:1