I will try to answer briefly, and I will assume by JJ+ you mean JJ, QQ, KK, AA. I will also use the 2% 4% rule when counting outs as a shortcut. (google it if you aren't familiar, very useful at the table)
for JJ: Hero is ahead and villain has 2 outs, villain has 6 combinations of JJ with 8% equity
for QQ: Hero is drawing dead, villain has 1 combination of QQ with 100% equity
for KK: Hero is basically drawing dead, only possibility to win is running queens. villain has 6 combinations of KK with ~100% equity
for AA: Hero has 5 outs, (2 Queens, 3 4's) meaning villain has ~80% equity with 6 combinations of AA
19 total combinations, so just need to average the equity to get total equity.
(6 * 0.08) + 1 + (6 * 1) + (6 * 0.8) = 12.28 / 19 = 64.6% equity with JJ+