Hello,
Meredith has k toys and Gazali too
Meridith gives 20/100 * k
Gazali gives 85/100*k
So they gives 105/100 * k toys which is 126
105/100 *k=126
k=126*100 /105
They have left alltogether 80/100 * k + 15/100 *k= 95/100 *k
95/100*k=95/100* 126*100/105=114 (toys left).